Selecting a new barrel: Barrel Length?
I've just ordered a AWC M40A2 system with heavy contour Krieger barrel. However, I'm still trying to finalize my decision regarding barrel length.
Would the experienced members of Duty Roster please give me their recommendation on a choice between a 20 in. vs. 24 in. barrel? Other than some velocity loss (80 ft./sec out of the muzzel?) is there any reason not to go with the 20 in. I'm drawn to a weapon that's a little more "compact."
Thanks for your input!
Timothy Crabb <firstname.lastname@example.org>
USA - Wednesday, November 18, 1998 at 11:43:00 (EST)
I posted a message earlier today re: a barrel length question on an AWC precision rifle setup (i.e. should I go with a 20" or a 24" barrel on a .308 sniper setup).
FYI - I contacted AWC Technologies and my contact there stated that with the .308 the powder completes its burn around 18 1/2 inches. AWC believes a 20" barrel is optimal in terms of easier weapon handling, portability, etc. and that a longer barrel doesn't really gain you any real world advantage. She also said velocity reduction is negligible due to the powder burn rate. I suppose different powders might change that, but I found the information interesting.
Tim Crabb <email@example.com>
USA - Wednesday, November 18, 1998 at 15:58:54 (EST)
Im not sure who asked the question about which barrel length is better a 20 or a 24 incher. The powder is usually expended at the 20 inch length, but many prefer the longer barrels because the pressure is still building up until it (the bullet) leaves the barrel. I always thought an ideal barrel length for the 308 would be a 22 incher. Remember that is total overall barrel length and the chamber length of just over two inches is cut into the barrel. So you actually have 20 inches of rifling.
Alexander Ostapowicz <firstname.lastname@example.org>
In a state of confusion in the merry old land of , Ohio USA - Thursday, November 19, 1998 at 00:33:19 (EST)
Tim - You may get a total burn at 20 with some powders, others no. Even with a total burn at 20 inches the muzzel flash would be a bear and very hard to hide.
Fayetteville, NC USA - Thursday, November 19, 1998 at 00:55:59 (EST)
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