I did not want oo higack the therad about 284 Lapua, but I did read to see if I could get any information on my current issue.
I bought a 284 off a forum member and it shot outstanding for another 1000+ rounds, but unfortunately the barrel went south on me last year. I ordered 2 new Bartlien 5R at 8.75 twist and just got them chambered with a straight PTG 284 Reamer. I was unable to get the original reamer or print so I went with what my smith had (and has run succesfully on other barrels).
I was using Lapua brass that Came with the original barrel and had no issues until later in life (8 -10 loads by me + a few originals). I was running 50.3 gr of H4350 behind a berger 140 Hybrid delivering 2750. So I had purchased 200 pieces each of Peterson and Lapua, as that was all that was available at the time. I decided to start with the peterson. Dropped down to 50 gr and 20 thou off the lands as my break in load. BAM -Heavy bolt lift and hard clickers, but no other signs of pressure on the primer (Rem 9-1/2) Velocities were wild from 2680 to 2810. So after the fact I discovered the peterson is 2-2.5 less H2o capacity, so knowing that and a quickload run I drop back to 49.0 and work up by 0.2. Same thing at 9=49.2. For funnies I loaded half dozen virgin Lapua at the original 50 gr and they ran and extracted perfectly, albeit only at about 2680, but again some wild velocity swings.
Now this is a first time for me starting out on virgin brass with a larger caliber, all my previous experience in competition shooting and loading was with a 223, I saw velocity swings on virgin brass, but nothing like this. Maybe it's not abnormal, but it sure was a surprise. I don't question my technique as in the previous barrel and loads I was able to keep my SD's under 10 consistently
Not really sure what to look at next, but taking it back to smith to check out. Any other thoughts anyone might have to steer me in the right direction would be appreciated. Sorry for rambling.
I bought a 284 off a forum member and it shot outstanding for another 1000+ rounds, but unfortunately the barrel went south on me last year. I ordered 2 new Bartlien 5R at 8.75 twist and just got them chambered with a straight PTG 284 Reamer. I was unable to get the original reamer or print so I went with what my smith had (and has run succesfully on other barrels).
I was using Lapua brass that Came with the original barrel and had no issues until later in life (8 -10 loads by me + a few originals). I was running 50.3 gr of H4350 behind a berger 140 Hybrid delivering 2750. So I had purchased 200 pieces each of Peterson and Lapua, as that was all that was available at the time. I decided to start with the peterson. Dropped down to 50 gr and 20 thou off the lands as my break in load. BAM -Heavy bolt lift and hard clickers, but no other signs of pressure on the primer (Rem 9-1/2) Velocities were wild from 2680 to 2810. So after the fact I discovered the peterson is 2-2.5 less H2o capacity, so knowing that and a quickload run I drop back to 49.0 and work up by 0.2. Same thing at 9=49.2. For funnies I loaded half dozen virgin Lapua at the original 50 gr and they ran and extracted perfectly, albeit only at about 2680, but again some wild velocity swings.
Now this is a first time for me starting out on virgin brass with a larger caliber, all my previous experience in competition shooting and loading was with a 223, I saw velocity swings on virgin brass, but nothing like this. Maybe it's not abnormal, but it sure was a surprise. I don't question my technique as in the previous barrel and loads I was able to keep my SD's under 10 consistently
Not really sure what to look at next, but taking it back to smith to check out. Any other thoughts anyone might have to steer me in the right direction would be appreciated. Sorry for rambling.
