.280 rem loads

[SR80]

For all you .280 lovers out there, what kinda velocity are you getting with 140gr bullets. Im getting 2850fps with 140 gr ttsx, 53.5gr RL-19. 0.6" groups at 100 meters. Great accuracy but I was hoping to get a little more speed out of a 28inch barrel. Thanks.

 

[Slapshot]

I had a load for 140 Accu-bonds clocking around 3100. It was a bit 'warm' but not crazy. Mine likes IMR 4350, but it is only a 22" barrel.

 

[SR80]

wow thats got some good velocity, i have some of that powder, i havent tried it yet. As far as the barnes manual the 4350 looked like it would be a slower powder as far as bullet spd.

 

[stubblejumper]

3000fps to 3050fps is normal for a 140gr bullet in a 24" barrel,so in a 28" barrel,you should easily achieve 3100fps.

 

[manitou210]

Your friend could be IMR 4831, 2900fps in 22" also RL17 could get your 140 gr moving right along.

 

[Slapshot]

Internet lore indicates the load data for the 280 has been deliberately reduced to accommodate for some rifles made with weaker actions in the 50's. I cant remember all the details, it's out there if you google.
I do know the SAAMI pressures for the 270 is considerably higher than the 280, which makes no sense as they are based on the same 30-06 case.

 

[SR80]

yeah i remember reading about the loads in most manuals being lowered for older guns and for semi autos and pumps