Still struggling with the bergers. I screwed the barrel back on yesterday. The barrel was pulled with 2025 rounds on it.
Started the test with ammo that had been loaded in June 2023. I have a friend that gave me 20 131s the check the load with. All the rounds in this test were pulled down from a batch in 6/23 and reloaded with the same brass and powder to specs.
All brass is 5x fired GAP, CCI 450, H4350, trimmed to 1.718. During seating everything felt roughly the same for neck tension.
1st string 5 shots (my buddy runs almost this exact load in a barrel made with my reamer without any problems.)
36.8 grains , Berger 135, CBTO 1.945, OAL 2672, .026 Jam. It ran at 2728fps SD 9.7
Brass Showed pressure - ejector swipe and a little brass flow on 2 pieces.
2nd string 5 shots. Bullet seated deeper.
36.8 grains, Berger 135, CBTO 1.913, OAL 2647, .005 jump. Average 2732fps, SD 9.1,
Brass Showed pressure - ejector swipe and a little brass flow on 1 piece.
3rd string 5 shots original blackjack load
36.7 grains, Blackjack ACE 131, CBTO 1.913, OAL 2.675, .030 jump. Average 2781 SD 9.5,
No pressure signs, running same speed as the load did 2 years ago.
4th string Hornady 134 ladder
Hornady 134 ELD-M, CBTO 1.915, OAL 2.679, .065 jump.
See above. No pressure sign’s throughout ladder. Very similar to what I saw with the blackjacks.
5th string Berger 135 ladder.
Berger 135, CBTO 1.913, OAL 2.647, .005 jump.
34.2. 2560
34.5. 2602
34.8. 2629
35.1. 2631
35.4. 2652
35.7. 2660 ejector swipe
36.0. 2677
36.3. Xxxx
36.6. Xxxx
36.9. Xxxx