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I have 16", 20" and 24" 308s and my loads look like sort of like this:
43 varget LC brass 175SMK
16" = 2450 20" = 2530 24" = 2600ish
My thinking is either have a 16" or a 24". The 20" isn't as compact as the 16" and can't reach out as far as the 24" so I'm not sure what the point of it is.
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: BCP</div><div class="ubbcode-body">I have 16", 20" and 24" 308s and my loads look like sort of like this:
43 varget LC brass 175SMK
16" = 2450 20" = 2530 24" = 2600ish
My thinking is either have a 16" or a 24". The 20" isn't as compact as the 16" and can't reach out as far as the 24" so I'm not sure what the point of it is. </div></div>
I have 2 Remington 308 5Rs one is the 20" inch and the other is 24".
I know that they are 2 differnt rifles but you would think them to be pretty close.
The 24" runs 178s @ about 2720, and the 20" runs the same load @ 2690. The 20 seems more accurate. But again its two different guns and other factors may play a part.
I had always heard 20-25 fps per inch the barrel is shortened. But even this can vary. Depending on the powder, if the barrel is so long that the powder gasses aren't expanding enough, the additional length and drag against the inside of the barrel can actually begin to slow the velocity.
The information above is consistent with all the stuff I have read in various articles over the past 20 years.