HuntingNut
HuntingNut
   Login or Register
HomeCommunity ForumsPhoto AlbumsRegister
     
 

User Info

Welcome Anonymous


Membership:
Latest: qpww66
New Today: 1
New Yesterday: 1
Overall: 12605

People Online:
Members: 0
Visitors: 291
BOT: 2
Total: 293
Who Is Where:
 Visitors:
01: Home
02: Forums
03: Home
04: Forums
05: Forums
06: Photo Albums
07: Photo Albums
08: Home
09: Photo Albums
10: Forums
11: Your Account
12: Forums
13: Home
14: Forums
15: Home
16: Forums
17: Forums
18: Home
19: Forums
20: Photo Albums
21: Home
22: Forums
23: Home
24: Home
25: Home
26: Home
27: Home
28: Forums
29: Photo Albums
30: Home
31: Photo Albums
32: Home
33: Home
34: Forums
35: Forums
36: Forums
37: Forums
38: Home
39: Forums
40: Home
41: Photo Albums
42: Home
43: Forums
44: Forums
45: Photo Albums
46: Photo Albums
47: Forums
48: Forums
49: Forums
50: Forums
51: Forums
52: Forums
53: Forums
54: Forums
55: Photo Albums
56: Forums
57: Forums
58: News
59: Forums
60: Forums
61: Forums
62: Forums
63: Forums
64: Photo Albums
65: Photo Albums
66: Forums
67: Your Account
68: Home
69: Home
70: Forums
71: Forums
72: Photo Albums
73: Home
74: Forums
75: Your Account
76: Forums
77: Home
78: Forums
79: Photo Albums
80: Home
81: Forums
82: Photo Albums
83: Photo Albums
84: Forums
85: Forums
86: Home
87: Photo Albums
88: Forums
89: Forums
90: Forums
91: Forums
92: Your Account
93: Home
94: Home
95: Forums
96: News
97: Home
98: Home
99: PointBlank Ballistics
100: Forums
101: Photo Albums
102: Home
103: Home
104: Photo Albums
105: Forums
106: Home
107: Home
108: Home
109: Home
110: Forums
111: Home
112: Home
113: Forums
114: Home
115: Forums
116: Forums
117: Forums
118: Forums
119: Forums
120: Forums
121: Photo Albums
122: Photo Albums
123: Forums
124: Forums
125: Home
126: Photo Albums
127: Your Account
128: Forums
129: Forums
130: Forums
131: News
132: Forums
133: Forums
134: Forums
135: Photo Albums
136: Photo Albums
137: Forums
138: Forums
139: Home
140: Home
141: Your Account
142: Forums
143: Forums
144: Forums
145: Home
146: Home
147: Forums
148: Home
149: Forums
150: Forums
151: Forums
152: Forums
153: Forums
154: Forums
155: Forums
156: Forums
157: Home
158: Forums
159: Home
160: Forums
161: Home
162: Home
163: Forums
164: Forums
165: Forums
166: Forums
167: Forums
168: Forums
169: Photo Albums
170: Home
171: Your Account
172: Forums
173: Forums
174: Home
175: Forums
176: News
177: Forums
178: Forums
179: Forums
180: Forums
181: Home
182: Forums
183: Forums
184: Forums
185: Home
186: Photo Albums
187: Forums
188: Photo Albums
189: Forums
190: Forums
191: Forums
192: Forums
193: Forums
194: Forums
195: Your Account
196: Forums
197: Photo Albums
198: Forums
199: Photo Albums
200: Forums
201: Forums
202: Forums
203: Home
204: Home
205: Forums
206: Home
207: Forums
208: Home
209: Photo Albums
210: Forums
211: Photo Albums
212: Photo Albums
213: Photo Albums
214: Photo Albums
215: Photo Albums
216: Forums
217: Photo Albums
218: Photo Albums
219: Photo Albums
220: Forums
221: Your Account
222: Home
223: Photo Albums
224: Forums
225: Photo Albums
226: Photo Albums
227: News
228: Forums
229: Photo Albums
230: Photo Albums
231: Forums
232: Photo Albums
233: Forums
234: Your Account
235: Photo Albums
236: Home
237: Home
238: Home
239: Photo Albums
240: Photo Albums
241: Forums
242: Photo Albums
243: Home
244: Forums
245: Photo Albums
246: News
247: Forums
248: Photo Albums
249: Forums
250: Forums
251: Home
252: Home
253: Forums
254: Forums
255: Your Account
256: Forums
257: Home
258: Photo Albums
259: Forums
260: Forums
261: Forums
262: Photo Albums
263: Home
264: Home
265: Home
266: Home
267: Forums
268: Home
269: Forums
270: Home
271: Forums
272: Forums
273: Forums
274: Forums
275: Forums
276: Home
277: Home
278: Home
279: Photo Albums
280: Forums
281: Your Account
282: Home
283: Forums
284: Forums
285: Home
286: Home
287: Forums
288: Your Account
289: Home
290: Home
291: Photo Albums
  BOT:
01: Forums
02: Home

Staff Online:

No staff members are online!
 

Coppermine Stats
Photo Albums
 Albums: 305
 Pictures: 2361
  · Views: 405861
  · Votes: 1309
  · Comments: 86
 

Support our Advertisers

What if...for slimjim by request, or anyone else, feel free.
Discussions related to Guns and Firearms
Go to page 1, 2, 3, 4, 5, 6  Next
View previous topic :: View next topic  
Author Message
fnuser
Super Member
Super Member


Joined: Dec 23, 2008
Posts: 914
Location: S.W. Missouri, U.S.A.

PostPosted: Wed Jul 14, 2010 7:30 pm    Post subject: What if...for slimjim by request, or anyone else, feel free. Reply with quote

This is in relation to A.R.'s. What if you could use standard everything i.e. mags, bolts, uppers, lowers, the only thing different was the cartridge and barrel, moving a bullet of @90 g at a velocity of @2700f.p.s. conservatively with a b.c. of greater then .320. Wouldn't that be cool? I'm still cranking #'s but have ordered the dies, upper,bolt carrier group, and am drawing barrel contours in my sleep. So I'm pretty serious. .25 UGALDE, basically an ackley improved .223 Remington case necked up to .257 bullet dia. produced mostly for the contender crowd , thus the moniker .25 T.C.U. Has proven itself in 14" guns already so a 20" or 21" in a basic H-Bar config might be just the ticket. You got one Pumpkin? I only found it in c.o.t.w.#7 so the loads are few but it looks promising. I'll keep you posted.

_________________
N.R.A. Endowment Member
Back to top
View user's profile Photo Gallery
Pumpkinslinger
Super Member
Super Member


Joined: Sep 22, 2007
Posts: 4487
Location: NC foothills

PostPosted: Wed Jul 14, 2010 10:29 pm    Post subject: Re: What if...for slimjim by request, or anyone else, feel free. Reply with quote

I looked briefly at the 7mm TCU for an AR but the OAL is too long. A quick check didn't find an OAL for the .25 TCU but you'll want to keep that in mind.

_________________
Mike

"I ain't no better than anyone else, and there ain't no one better than me!" Ma Kettle

Back to top
View user's profile AIM Address Yahoo Messenger Photo Gallery
slimjim
Super Member
Super Member


Joined: May 16, 2009
Posts: 7529
Location: Fort Worth TX

PostPosted: Thu Jul 15, 2010 5:06 am    Post subject: Re: What if...for slimjim by request, or anyone else, feel f Reply with quote

from .25 Ugalde

The 25 Ugalde, also known as the Thompson/Center Ugalde, was developed by Wes Ugalde of Fallon, Nevada, in 1987. The cartridge, like other TCU cartridges, is based on the necked up and Improved 223 Remington case. The 25 TCU is intended for metallic silhouette shooting, but would also make a good varmint cartridge at moderate ranges. There is a good selection of 25 caliber bullets available in weights from 60 to 120 grains. By the standard of today, ballistics are not spectacular, but quite adequate for the intended purpose. Dean Grennell reported less than minute of angle groups. It is in about the same class as the old 25-35 and would be marginal for deer.

This text is based on information from “Cartridges of the World”, Hodgdon reloading manual, the cartridge designer and/or own resources.
Back to top
View user's profile
slimjim
Super Member
Super Member


Joined: May 16, 2009
Posts: 7529
Location: Fort Worth TX

PostPosted: Thu Jul 15, 2010 5:38 am    Post subject: Re: What if...for slimjim by request, or anyone else, feel free. Reply with quote

Ok, fnuser, why did you pick the .257 vs .243? The 6mm/223 or 6mm TCU has gained a lot of interest.

www.ar15armory.com/for...48703.html

_________________
"To anger a conservative, lie to him. To anger a liberal, tell him the truth." - Theodore Roosevelt

"The world is a dangerous place to live; not because of the people who are evil, but because of the people who don't do anything about it." - Albert Einstein
Back to top
View user's profile
slimjim
Super Member
Super Member


Joined: May 16, 2009
Posts: 7529
Location: Fort Worth TX

PostPosted: Thu Jul 15, 2010 5:45 am    Post subject: Re: What if...for slimjim by request, or anyone else, feel free. Reply with quote

As I've been looking at alternative calibers for the AR, I've had one criteria - its got to be able to shoot the lighter bullets at velocities greater than 3000 fps. That has ruled out the 6.5 Grendel for me. The 6mm Turbo 40 Improved has sparked my interest.

However, if you are going to use all common components but the barrel, its impressive to see how much more performance one can get with the 6mm/223 over the standard AR cartridge. Makes you wonder why the US Military has hung on to the 5.56 for so long when they can do so much more with just a bullet diameter change and get out of the realm of being a "poodle shooter"

Am very interested to see how your project moves along.

_________________
"To anger a conservative, lie to him. To anger a liberal, tell him the truth." - Theodore Roosevelt

"The world is a dangerous place to live; not because of the people who are evil, but because of the people who don't do anything about it." - Albert Einstein
Back to top
View user's profile
fnuser
Super Member
Super Member


Joined: Dec 23, 2008
Posts: 914
Location: S.W. Missouri, U.S.A.

PostPosted: Thu Jul 15, 2010 9:25 am    Post subject: Re: What if...for slimjim by request, or anyone else, feel free. Reply with quote

pumpkin I did before i ordered the dies this time. Actually the 85g Nosler offering looks custom made for this. Slimjim yeah the 6.5grendal attracted me too, also the 6.8 but neither were quite "it" for one reason or another. i am basing my necking up project on past experience of other wildcats i have tried, take the 35 whelen for example it is about as familiar as its parent. once you enlarge the case neck much further it starts to act more like a straight case then a bottleneck internally speaking and externally speaking the geometry of the .223 case is very similar to a shortnecked 30-06 in its various ratio's so if you factor this approximately (1.16) you get .257.

_________________
N.R.A. Endowment Member
Back to top
View user's profile Photo Gallery
fnuser
Super Member
Super Member


Joined: Dec 23, 2008
Posts: 914
Location: S.W. Missouri, U.S.A.

PostPosted: Thu Jul 15, 2010 10:34 am    Post subject: Re: What if...for slimjim by request, or anyone else, feel free. Reply with quote

75g's will get close to 3000 but it is all speculative until i actually chono my results with loads that work, I won't use a load based only on velocity.

_________________
N.R.A. Endowment Member
Back to top
View user's profile Photo Gallery
PaulS
Super Member
Super Member


Joined: Feb 18, 2006
Posts: 3539
Location: South-Eastern Washington - the State

PostPosted: Thu Jul 15, 2010 11:12 am    Post subject: Re: What if...for slimjim by request, or anyone else, feel free. Reply with quote

I tried the 6mm TCU in a 24" barrel and couldn't get the velocity anywhere near what I wanted. I had to go to a 30-30 case necked down to get the 3000 fps that I was wanting. Not only did the velocity come up but the groups shrunk down to a nice cloverleaf hole at 100 yards and about 1/4 MOA at 200 using 85 grain Sierra bullets.

_________________
Paul
__________________
Speer, Lyman, Hodgdon, Sierra, and Hornady = reliable loading data
So and So's pages on the internet = NOT reliable loading data
Always check data against manuals
NEVER exceed maximum listed loads
Back to top
View user's profile Send e-mail
fnuser
Super Member
Super Member


Joined: Dec 23, 2008
Posts: 914
Location: S.W. Missouri, U.S.A.

PostPosted: Thu Jul 15, 2010 5:57 pm    Post subject: Re: What if...for slimjim by request, or anyone else, feel free. Reply with quote

were you using 85's in the 6tcu also? what did you actually get? .25 t.c.u. load= 24.5gr IMR 4198 85gr Nosler BT--2800fps this data came from another site seems a little hot to me, this was a 21" contender. he didn't list his c.o.a.l. so he might have been seating them out a little to get some volume.

_________________
N.R.A. Endowment Member


Last edited by fnuser on Thu Jul 15, 2010 6:07 pm; edited 2 times in total
Back to top
View user's profile Photo Gallery
slimjim
Super Member
Super Member


Joined: May 16, 2009
Posts: 7529
Location: Fort Worth TX

PostPosted: Thu Jul 15, 2010 6:04 pm    Post subject: Re: What if...for slimjim by request, or anyone else, feel free. Reply with quote

Yes, PaulS, this sounds very interesting! Any pictures of the cartridges for comparison? Picture of the rifle? Please tell us more!!

_________________
"To anger a conservative, lie to him. To anger a liberal, tell him the truth." - Theodore Roosevelt

"The world is a dangerous place to live; not because of the people who are evil, but because of the people who don't do anything about it." - Albert Einstein
Back to top
View user's profile
fnuser
Super Member
Super Member


Joined: Dec 23, 2008
Posts: 914
Location: S.W. Missouri, U.S.A.

PostPosted: Thu Jul 15, 2010 6:15 pm    Post subject: Re: What if...for slimjim by request, or anyone else, feel free. Reply with quote

slim, I just got a chance to look at the h335 and w748 loads you referenced and 2400+f.p.s. out of a 12" tube sounds promisingthey are seated out though 2.48" probably the longest i could go would be @ .25" shorter 2.245"-2.247"Hopefully you can see the ring I made on the .250 "



sierra75jhp.jpg
 Description:
 Filesize:  50.81 KB
 Viewed:  10477 Time(s)

sierra75jhp.jpg


.223 w .85g .257.jpg
 Description:
 Filesize:  55.6 KB
 Viewed:  10482 Time(s)

.223 w .85g .257.jpg


_________________
N.R.A. Endowment Member
Back to top
View user's profile Photo Gallery
fnuser
Super Member
Super Member


Joined: Dec 23, 2008
Posts: 914
Location: S.W. Missouri, U.S.A.

PostPosted: Thu Jul 15, 2010 7:55 pm    Post subject: Re: What if...for slimjim by request, or anyone else, feel free. Reply with quote

maybe the 75's without a boattail? I may have to dig around and see if I have some sierra 87g. softpoints if I remember right they don't have a boattail. The rings on the bullets show approximate land contact if I build a gun dedicated to 75g hps it would take alot of experimentation out but might actually simplify stuff, too soon to know but a slow twist might be neat 1-11" or 1-12"

_________________
N.R.A. Endowment Member
Back to top
View user's profile Photo Gallery
slimjim
Super Member
Super Member


Joined: May 16, 2009
Posts: 7529
Location: Fort Worth TX

PostPosted: Fri Jul 16, 2010 3:38 am    Post subject: Re: What if...for slimjim by request, or anyone else, feel free. Reply with quote

fnuser, do you have an on-line source for looking at the .257 TCU load data?

_________________
"To anger a conservative, lie to him. To anger a liberal, tell him the truth." - Theodore Roosevelt

"The world is a dangerous place to live; not because of the people who are evil, but because of the people who don't do anything about it." - Albert Einstein
Back to top
View user's profile
chambered221
Super Member
Super Member


Joined: Aug 17, 2007
Posts: 3455
Location: Lost for good !!!

PostPosted: Fri Jul 16, 2010 4:49 am    Post subject: Re: What if...for slimjim by request, or anyone else, feel f Reply with quote

What is the intended purpose of this rig ???

_________________
Ask as many people needed, sooner or later your question will be answered the way you want it answered !!!

A free people ought not only to be armed and disciplined, but they should have sufficient arms and ammunition to maintain a status of independence from any who might attempt to abuse them, which would include their own government.
~George Washington
Back to top
View user's profile Photo Gallery
PaulS
Super Member
Super Member


Joined: Feb 18, 2006
Posts: 3539
Location: South-Eastern Washington - the State

PostPosted: Fri Jul 16, 2010 12:19 pm    Post subject: Re: What if...for slimjim by request, or anyone else, feel free. Reply with quote

The only way to get up to even the minimum velocity that we wanted was to go with a 60 grain bullet in the TCU. That got 2850 fps with 26.8 gr of H335. The 85 grain loads were below 2650 fps. This was all in the Contender carbine.
The difference between 30-30 and the 6mm-30 is only the neck - the overall length is the standard length and no angles were changed. It does shorten the neck a little but it is still longer than the one caliber dimension with the 6mm bullet.
One surprising thing we found with the 6mm-30 was that even with starting loads of H335 we had cratered primers from beginning loads to maximum listed loads. We went to H4064 32.1gr and the Sierra 85 grain 1520 bullet and got 3002 fps. A real tack driver that can shoot out to an honest 200 yards on deer or down to ground squirrels.

_________________
Paul
__________________
Speer, Lyman, Hodgdon, Sierra, and Hornady = reliable loading data
So and So's pages on the internet = NOT reliable loading data
Always check data against manuals
NEVER exceed maximum listed loads
Back to top
View user's profile Send e-mail
Display posts from previous:   
Post new topic   Reply to topic   Printer Friendly Page    Forum Index » Gun & Firearm Discussions
Page 1 of 6
All times are GMT - 7 Hours
Go to page 1, 2, 3, 4, 5, 6  Next



Jump to:  


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You cannot attach files in this forum
You can download files in this forum


Advertisements
 


Valid CSS! Valid HTML 4.01!
Click to check if this page is realy HTML 4.01 compliant for speed :)

All logos and trademarks in this site are property of HuntingNut.com.
The comments are property of their posters, all the rest © 2011 by HuntingNut.com
Interactive software released under GNU GPL, Code Credits, Privacy Policy

.: Upgraded to DragonFly 9.2 by Dizfunkshunal :.