Reloading for a Short Barrel

brent_86 · Post by **brent_86** » Tue Oct 21, 2008 6:31 pm

Hi,
I have been shooting F-TR for a bit of fun for the last six months or so and so far have really been enjoying the sport, However i only have a 20" barrel on my 308 so i have been loading the 155 lapua bullet to help me keep up a bit with the longer guns. I am interested in working up a new load to be within the rules. I keep reading that the new dyer has a higher B.C than the sierra or nosler but what is the actual figure?

Thanks'
Brent

johnk · Post by **johnk** » Tue Oct 21, 2008 6:47 pm

Brent,

Most call it at .5, about the same as the Lapua. I've only shot it twice, once at 500 & once at 600 yards, but the fall of shot compared to the standard Dyrer was about spot on with ballistic predictions for that BC.

Incidentally, I made no effort to work up a load for it & in a senile daze, set my seater for what I thought would give it the same short jump I've been using. I screwed up 7 gave them .060" but they didn't mind. The 500 yard had quiet spots & in the second half, I hit the spotter six times for a group of 2½-3 inches, according to my mate marking.

Oh, I do moly.

John

brent_86 · Post by **brent_86** » Tue Oct 21, 2008 6:59 pm

That should be excellent I found that that i don't loose much velocity when using 2206H my current load is 46gn which gives me a average velocity of 2903fps with the scenars, will this be competitive against a longer barreled gun? I'm probably reading to much into it but how much speed would a longer barrel gain on me?

Quick · Post by **Quick** » Tue Oct 21, 2008 8:05 pm

Brent, have a look on the Thales Aust site and they have some velocity figures for there different powders with different sized rounds. I think though if you are getting 2900fps+ with a shorter barrel then thats a good load.

There is much debate with regards to short vs long barrel. I dont profess to understand it as I've heard that shorter barrels are better for .308 as you get better accuracy with a shorter and more ridig barrel but you lose velocity which is the down side. I think that when you start getting out to 800yds + that the longer barrels and their velocity come into play.

brent_86 · Post by **brent_86** » Wed Oct 22, 2008 4:17 pm

Cheers, thanks for the info

Grant · Post by **Grant** » Thu Oct 30, 2008 3:23 pm

I shoot f class Std and have a mossberg action with a 30 inch barrel screwed in and find that it shoots very consistant using AR2208 powder @45.4gr with a155 gr projectlie every where from 300 - 1000 yards