HuntingNut
HuntingNut
   Login or Register
HomeCommunity ForumsPhoto AlbumsRegister
     
 

User Info

Welcome Anonymous


Membership:
Latest: Left-eye
New Today: 0
New Yesterday: 1
Overall: 12441

People Online:
Members: 0
Visitors: 107
BOT: 4
Total: 111
Who Is Where:
 Visitors:
01: Forums
02: Forums
03: Forums
04: Photo Albums
05: Photo Albums
06: Forums
07: Forums
08: Photo Albums
09: Photo Albums
10: Forums
11: Photo Albums
12: Photo Albums
13: Forums
14: Forums
15: Forums
16: Photo Albums
17: Forums
18: Photo Albums
19: Forums
20: Forums
21: Forums
22: Forums
23: Forums
24: Forums
25: Forums
26: Forums
27: Forums
28: Forums
29: Forums
30: Forums
31: Forums
32: Forums
33: Forums
34: Forums
35: Forums
36: Forums
37: Forums
38: Forums
39: Forums
40: PointBlank Online
41: Forums
42: Forums
43: Forums
44: Your Account
45: Forums
46: Forums
47: Forums
48: Forums
49: Forums
50: Forums
51: Your Account
52: Forums
53: Forums
54: Forums
55: Forums
56: Forums
57: Forums
58: Forums
59: Forums
60: Forums
61: Forums
62: Forums
63: Forums
64: Forums
65: Forums
66: Forums
67: Forums
68: Forums
69: Photo Albums
70: Forums
71: Forums
72: Photo Albums
73: Forums
74: Statistics
75: Forums
76: Forums
77: Forums
78: Forums
79: Photo Albums
80: Forums
81: Forums
82: Photo Albums
83: Forums
84: Forums
85: Forums
86: Forums
87: Forums
88: Forums
89: Forums
90: Forums
91: Forums
92: Forums
93: Forums
94: Forums
95: Forums
96: Forums
97: Home
98: Forums
99: Forums
100: News
101: Forums
102: Forums
103: Forums
104: Forums
105: Photo Albums
106: Forums
107: Photo Albums
  BOT:
01: Forums
02: Photo Albums
03: Photo Albums
04: Photo Albums

Staff Online:

No staff members are online!
 

Coppermine Stats
Photo Albums
 Albums: 301
 Pictures: 2358
  · Views: 284875
  · Votes: 1297
  · Comments: 86
 

Support our Advertisers

Savage 10FP Build-Up
Discussions related to Guns and Firearms

View previous topic :: View next topic  
Author Message
Al_Sohlstrom
Member
Member


Joined: Aug 30, 2005
Posts: 75

PostPosted: Wed Aug 31, 2005 1:06 pm    Post subject: Savage 10FP Build-Up Reply with quote

Hi

Well - I was banging my head against how I was going to scope this thing.

In case you missed my other post, I'm looking to put together a 500 yard target-shooter, and I was considering a sloped mount, but I couldn't figure out how MUCH of a slope to use!

Enter Point Blank Ballistics Software!

So: I look up the stats on the Winchester 168 grain hollow-point boattail match ammo, and plug in the numbers. It looks interesting AND reasonable! SO: I reset the scope-height to accomodate my huge objective (51mm!!) scope and recalculate.

Wow! LOOK!!
Code::
Load Data
~~~~~~~~~

Name: .308 Cal, Winchester Hollow Boattail, 168 grn
Ballistic Coeff: 0.452
Bullet Weight: 168
Velocity: 2680
Target Distance: 425
Scope Height: 2.000
Temperature: 70
Altitude: 500

Ballistic Data
~~~~~~~~~~~~~~~
  Range  Elevation  Velocity   Energy     ETA         Drop      Max Y  10mph Wind Deflect
  0 yds   -2.00 in  2680 fps  2679 fpe  0.000 sec    0.00 in  -2.00 in   -0.00 in
.
.
.
200 yds   13.88 in  2311 fps  1992 fpe  0.241 sec   10.66 in   2.02 in    2.97 in
225 yds   14.17 in  2267 fps  1917 fpe  0.274 sec   13.68 in   2.84 in    3.84 in
250 yds   14.03 in  2224 fps  1844 fpe  0.307 sec   17.14 in   3.79 in    4.82 in
.
.
.
425 yds    0.00 in  1932 fps  1392 fpe  0.560 sec   54.39 in  14.43 in   14.79 in
450 yds   -4.10 in  1892 fps  1335 fpe  0.599 sec   61.81 in  16.62 in   16.71 in
475 yds   -8.87 in  1853 fps  1281 fpe  0.639 sec   69.90 in  19.03 in   18.84 in
500 yds  -14.33 in  1814 fps  1228 fpe  0.680 sec   78.67 in  21.66 in   21.15 in
525 yds  -20.49 in  1777 fps  1177 fpe  0.722 sec   88.14 in  24.53 in   23.63 in
550 yds  -27.37 in  1740 fps  1129 fpe  0.765 sec   98.34 in  27.65 in   26.29 in
.
.
.
Sweet SALVATION! What a great chunk of data! 14.17" high almost EXACTLY at mid-range, and 14.33" low at terminal!

Now - if I can only find a target with a 28.5" bullseye....

More importantly: In the, "Drop," column, I see that I have a total drop of 78.67"! Now: Let me see... 78.67" (total drop) divided by 5 (to scale it to 100 yards by the 'similar triangles' rule) gives me 15.734 inches! One Minute-Of-Angle at 100 yards is...

oh drat...

Ok - I remember that it's, "about an inch," but this is MATHMATICS! I want my, "abouts," to be about three decimal places!!

So: Circumferance of a circle with a radius of 3600" (inches in 100 yards) is:
2 • π • 3600" = ....
Uhhh - π = 3.14... uhhh....
Code::
How I need a drink, alcoholic of course
 3  1  4   1   5        9     2    6
so: 3.1415926
2 • 3.1415926 • 3600" = 22619.467"
The number of minutes in a circle:
360 • 60 = 21600
Inches in one MOA at 100 yards:
22619.467 / 21600 = 1.047"
(Mmm - wow - that really IS, "about," an inch!!)

So 15.734 / 1.047 = 15.028

As close to 15 MOA as I'm likely to get. My gut feeling was that 15 MOA would do the trick!

Now, I have PROOF!!

To three decimal places!!!

_________________
"Al's Postings," from the, "Good Eats Fan Page."
At the heart of evey complex problem lies a graceful solution involving explosives.
Back to top
View user's profile Photo Gallery
DallanC
Site Admin
Site Admin


Joined: Jan 18, 2005
Posts: 3120
Location: Utah

PostPosted: Wed Aug 31, 2005 1:58 pm    Post subject: Re: Savage 10FP Build-Up Reply with quote

LOL Nice math.

Notes: at 500 yards 1MOA rifle will be hitting within a 5" circle.

Also, for your paper target quest you might want to download and fool around with the PC version of PointBlank. It has a nifty little feature called PBR (point blank range) calculation that is exactly what you are trying to do here. PBR is the max distance your bullet will be no more than TargHeight / 2 above the line of site and -Targheight/2 below the line of sight. It also shows what the zero distance is for this setup.

I like it for deer where I use say a 10" PBR.


-DallanC
Back to top
View user's profile Photo Gallery
Al_Sohlstrom
Member
Member


Joined: Aug 30, 2005
Posts: 75

PostPosted: Wed Aug 31, 2005 2:32 pm    Post subject: Re: Savage 10FP Build-Up Reply with quote

Hi

Great stuff! I'm going to spend some time inside the package.

Dude: You ROCK, mathematically and algorithmically speaking!

[edit] OOOH!

For a killzone of 28.50 inches:
Maximum Point Blank Range is 501 yrds
Sight in the rifle dead on at 426 yrds

Ok - I reiterate: Dude: You ROCK, mathematically and algorithmically speaking! [/edit]

_________________
"Al's Postings," from the, "Good Eats Fan Page."
At the heart of evey complex problem lies a graceful solution involving explosives.
Back to top
View user's profile Photo Gallery
Flint54
Member
Member


Joined: Apr 09, 2005
Posts: 389
Location: North Carolina

PostPosted: Mon Sep 05, 2005 12:27 am    Post subject: Re: Savage 10FP Build-Up Reply with quote

Cool Looks like you are really on your way to being a real "Hunting Nut".
Since I got my first "Modern" Savage @ 1998 (a 110 Tactical in .223) I have been sold on Savage Bolt Rifles. I ahve yet to find an out of the box rifle that can hold a candle to any I have picked up. I now have 3 10FP-LEs that I won't part with. I have totally built one up with a Kreiger .308 barrel, SSS Trigger, McMillian stock, Farrel base & rings & a Tasco Varmint 2 X 10 Mil Dot. This one willhold honest sub half inch groups with many loads.

Another semi built with the SSS trigger, modified factory tupperware stock, Weaver bases & rings and a Tasco Varmint 6 X 24 Mil Dot. This one has the factory barrel and will shoot in the 3s and on really good days has gone under .2 with many groups. This is with my loads, with Black hills REmanufactured you wouldn't want to be a varmint at any reasonable range. It would be safer at 5 yds than out at 300.

My final mod 10 is my any caliber, B & C stock, SSS trigger, Leuopold bases & QRW Rings. I have several barrels for this one and use it for most of my rifle hunting. Barrels so far are, 250 Savage, 260 Rem, 308 Win & soon to have a 358 Win also. I have been thinking of a 338-08 instead of the 358 Win as the bullet selection is a bit better.

I completely enjoy them all and would recommend a Savage Rifle over any Remchesger. Lower inital cost, better accuracy and above all extreem versitility and interchangability. What more can you ask for. Cool Cool Cool
Back to top
View user's profile Photo Gallery
515034s10ring
Super Member
Super Member


Joined: Sep 08, 2005
Posts: 1153
Location: Working my way back up and around

PostPosted: Mon Sep 19, 2005 5:14 pm    Post subject: Re: Savage 10FP Build-Up Reply with quote

Speaking of MOA and depending on what scope you use (which i'll get into in a sec) a good estimate (kill shot) of range finding can also be done.
If height or width can be estimated with using a Mil-Dot scope (or Horus Vision which is easier yet), you take the height of the target (in yards) and divided by the height of the target (in milliradians) and multiply by 1000 which equals the distance to the target in yards.
Example:
If the top of a 6 foot tall target (2 yards) (and for argument sake a person) lines up with one dot, and his feet line up four dots down you get this........2/4x1000=500 yards.

Leupold claims that the length of their dots are 1/4 Mil (miliradian) or 3/4 MOA (minute of angle) which turns out to be wrong.
1/4 Mil= .9
3/4 MOA=.785
After a phone call i was told that "most shooters buy these scopes that mostly understand MOA and not Miliradians, so we claim a figure (in MOA) that is close, but not exact". wtf (I was dumbfounded!)

(there may be some that think "Mil" stands for Military, well it stands for Miliradian) Wink

BTW....i put a Lothar polygon rifled barrel on my 10 and i do pretty well holding sub MOA out to 500+ yards. Sniper
Back to top
View user's profile
Al_Sohlstrom
Member
Member


Joined: Aug 30, 2005
Posts: 75

PostPosted: Wed Sep 21, 2005 4:44 pm    Post subject: Re: Savage 10FP Build-Up Reply with quote

Hi

Thanks for the words.

My Ken Farrell Sav. RTS.1.10 (Round Top Short, 1 piece, 10 MOA depression) arrived today. It's a BIG, MANLY... uhhh... I can't say that any more, can I... BIG, PERSONLY piece of matte black steel! It may need epoxy bedding to the reciever. It may NOT. I'm betting it will, and besides, epoxy-bedding is just a darned nice thing to know about, so it's off to the bookstores for me.

It looks like, once it's seated correctly, it'll ride right about .31" higher than the Weaver 2-piece mounts I have snugged on right now.

I put on the Weavers because they were availiable, and if not DEAD cheap, then BADLY-WOUNDED cheap. (Drat - I've used that joke, here, before.) They fit nicely, and my steel rule said they lined up like a charm. I used them to mount my Leupold QRW rings to my two scopes: a Bushnell Banner 6-18x50 for field and an Optronics 6-24x42 illuminated mil-dot for targets.

I should PROBABLY say that I used them to RUIN my QRW rings!

I couldn't get the screws to line up through the caps to the base correctly once the scope tube was in place, it turns out. It just FELT that way. I'm going to have to knock everything apart again and see what I can salvage. I suspect... SUSPECT, mind you... that I'll be able to get one full set out of the deal that'll be clean enough (with a bit of work) to be usable.

A LOT of education for $45, I think.

If I need to buy all new rings, though, I'm going to try to trade the Bushnell 50mm bell scope in on a similar 42mm bell scope and buy medium height rings. I like a big bell (more light IN is more light OUT, right), but... SHEESH! WHO KNEW!!

I've got three Harris bipods, one each of low, medium and high, each with its own HB6 stud for quick-change mounting to the 3/8" rail slot. I didn't go for swiveled bipods, though, because I figured to mostly be shooting from a table or bench with them. In the field, I'll go hasty with a treetrunk or some grass and leave the bipods in the case.

Next thing to do is to pull off the, "factory tupperware stock," which description I love for its vividness and accuracy, which STOCK I HATE for its TUPPERWARE..ey...ness, and torque the action into its new Choate Machine & Tool Ultimate Varminter stock.

I got a partial shipment from Sears last week with a 3/8" drive, 25-250 inch-pound torque wrench that'll get the job done (Choate says to use 65 in.-Lbs. for the action bolts) after I find somewhere to verify the torque.

SO: Pull apart rings and salvage, restock, read up about epoxy-bedding scope mounts, and try again!

A couple of questions:

Has anyone used a, "Ching sling," for REAL shooting? I've been looking as slinging systems and it looks like it provides a good balance between the drag-yer-cannon-through-the-mud sling and the get-your-rifle-to-bahave-whilst-you-shoot-it sling. The Choate stock is already set up with side-swivels, and I think that, with a very little extra work, I could be Chinging right along.

I've been told to tighten the ring cap screws, "about as tight as I can get them." Well... I live in a FRAGILE world. "About as tight" for me is WAY past stripped out, so that is TOTALLy wrong. I've also been told to tighten the ring-mount screws the same way! Same deal!! Another source said 65 in.-Lbs. on the ring-mount screws, so there is, SOMEWHERE a torque spec on the cap screws too!

Understanding that: Does anyone have any experience with micrometer click torque SCREWDRIVERS? I'm kind of interested in putting one in my range kit for periodic checking of screws. Am I over-thinking this? Should I just put the thing together with Black Death LockTite and be done with it??

Thanks for the help, and more soon!!

_________________
"Al's Postings," from the, "Good Eats Fan Page."
At the heart of evey complex problem lies a graceful solution involving explosives.
Back to top
View user's profile Photo Gallery
515034s10ring
Super Member
Super Member


Joined: Sep 08, 2005
Posts: 1153
Location: Working my way back up and around

PostPosted: Wed Sep 21, 2005 5:14 pm    Post subject: Re: Savage 10FP Build-Up Reply with quote

Al, I don't know much about the sling, Nor have i used a mic. screwdriver.... but i will give you some good advice on tightening screws and mounts. Cool It is easy to over tighten but a good way not to strip is by using loctite on the screwes first, snug what ever it is you are tightening, then with another 1/4 turn and no more than 1/2, you are in the good.
Just make sure the threads are clean and when tightening because it should be smooth up until sung (which snug usually is done by using three fingers and your thumb for initial tightening, then your whole hand).
I know everybody is and has different ways to do things, and this is how i have been doing my smithing for many, many years. While the way i do it is ok for some, it's not for all but i hope it helps! Cool
Back to top
View user's profile
Bushmaster
Super Member
Super Member


Joined: Jun 12, 2005
Posts: 10262
Location: Ava, Missouri

PostPosted: Wed Sep 21, 2005 7:07 pm    Post subject: Re: Savage 10FP Build-Up Reply with quote

Put a little of that Loctite in the rings too...It will help keep the scope from moving during recoil...

_________________
I have one nerve left and yer standin' on it...

DEMOCRACY Two wolves and one sheep voting on what to have for lunch...
LIBERTY A well armed sheep contesting the outcome of the vote...
Back to top
View user's profile
Display posts from previous:   
Post new topic   Reply to topic   Printer Friendly Page    Forum Index » Gun & Firearm Discussions
Page 1 of 1
All times are GMT - 7 Hours



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 :.