HuntingNut
HuntingNut
   Login or Register
HomeCommunity ForumsPhoto AlbumsRegister
     
 

User Info

Welcome Anonymous


Membership:
Latest: kurtsteinke
New Today: 1
New Yesterday: 0
Overall: 12413

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

Staff Online:

No staff members are online!
 

Coppermine Stats
Photo Albums
 Albums: 300
 Pictures: 2352
  · Views: 271272
  · Votes: 1288
  · Comments: 86
 

Support our Advertisers

different calibers same weight bullet, different speeeds????
Discussion regarding the reloading of ammunition and tuning of loads for accuracy
Post new topic   Reply to topic   Printer Friendly Page    Forum Index » Reloading Ammunition

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


Joined: Apr 02, 2008
Posts: 50
Location: NEW ZEALAND

PostPosted: Sun Apr 13, 2008 4:00 pm    Post subject: different calibers same weight bullet, different speeeds???? Reply with quote

i was wondering why a .243 and lets say a .308 with the same bullet weight (105gr) can be sent at different speeds. both have the same case size. or a .22.243 for example. (im assuming thats a .243 necked down to a .22 caliber. just wondering
Back to top
View user's profile
Pumpkinslinger
Super Member
Super Member


Joined: Sep 22, 2007
Posts: 4371
Location: NC foothills

PostPosted: Sun Apr 13, 2008 6:25 pm    Post subject: Re: different calibers same weight bullet, different speeeds???? Reply with quote

If the pressure is the same for both cartridges the one with the bigger bore will provide more force to the bullet.

Force = Pressure x Area

More force means more acceleration

Acceleration = Force / Mass

_________________
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
gelandangan
Super Member
Super Member


Joined: May 07, 2006
Posts: 5677
Location: Sydney Australia

PostPosted: Sun Apr 13, 2008 8:33 pm    Post subject: Re: different calibers same weight bullet, different speeeds???? Reply with quote

Doing some number juggling with an internal ballistics program gives these results
(for this example, I use 100gn projectile weight)
.243 Win
Projectile .243 100gn Hornady SP 2450
Powder Varget 35 Grains
Barrel 20 inch
C.O.L. 2.650
Muzzle velocity 2647 FPS
Energy 1556 ft.lbs

.308 Win
Projectile .308 100gn Hornady SJ 3005
Powder Varget 35 grains
C.O.L. 2.650 inch
Barrel 20 inch
Muzzle Velocity 2065fps
Energy 947 ft.lbs

_________________
A straight line is the shortest distance between two points.
A smile is the shortest distance between two people.

The government I trust .. is my .45-70 Government.

Do - Not try!


gelandangan.weebly.com/
Back to top
View user's profile Visit poster's website
Display posts from previous:   
Post new topic   Reply to topic   Printer Friendly Page    Forum Index » Reloading Ammunition
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 :.