Very interesting! What brass do you use, 308? Run any over a chronograph yet, if so are you getting standard velocity or more since we have better powder?
ps I'm am guessing yours is the target one?
Yes it is.
Any 30.06 derived brass can be converted we have used .308 and .243. The dies and forming dies were brought off the shelf.
Right, not sure of the best way to post these but here goes;
factory 1970's production test round 140 grain bullet was 2479 fps
the next four rounds (first of five failed to register on chrono) were;
30. grains N133 120 grain sierra soft point
2485
2553
2520
2499
10057 with an average of 2514 fps
30.2 grains
2561
2537
2471
2506
2532
12607
with an average of 2521 fps
30.4 grains
2553
2513
2518
2521
2538
12643
with an average of 2528 fps
30.6 grains
2567
2539
2550
2527
2529
12712
with an average of 2542
30.8 grains
2566
2525
2492
2533
2509
12625
with an average of 2525
31 grains
2551
2571
2541
2603
2576
12842
with an average of 2568
31.2 grains
2592
2572
2591
2599
2622
12976
with an average of 2595
31.4 grains
2619
2625
2655
2678
2612
13189
with an average of 2637
31.6 grains
2621
2594
2612
2630
2638
13095
with an average of 2619
31.8
2644
2637
5281
with an average of 2640
The bottom number is the total, variances could be due to neck tension of different cases made this year, creating a true uniform case is a real challenge.
We ran out of time to make the full amount of ammo for testing so we had hoped to go to 32 grains and then start with a 140 grain bullet. Plus we didn't have a moderator with that thread available.