Post by parson45 on Sept 17, 2009 10:57:33 GMT -5
Back from my so-called vacation and trying to catch up.
As promised previously, here are the numbers from the old vs. new 2400 test. There are flaws in the test. I started using mixed brass, which normally causes me no trouble, but there were some Remington cases in the can that were shorter than all the others, therefore, their crimp wasn’t as good and my extreme spreads widened. When I used Starline brass only, and the ES numbers improved immensely. Also, I started with my 4 5/8ths inch 50th Anniversary Flattop, but when I decided to test the original Keith/Lyman bullet, I found it was too long for the chamber. I then went to a 4 5/8ths inch Blackhawk. I also used the Blackhawk for testing Elmer’s original load of 15.5 grains, which every manual published today says is too stout. The 14.0 load is my standard load and is considered maximum by my more modern manuals.
This is what happened in my guns. All the loads were safe. None showed excess pressure. In MY guns. Work up slowly in YOUR guns. I DO NOT recommend the original Keith load. Use any of these data at your own risk.
168 grain Keith from Leadhead, 14.0 New 2400, mixed brass
Flattop
1206 fps ES 194.9
Rossi 20” Carbine
1676 fps ES 97.37
Same with Starline Brass
Flattop
1265 fps ES 64.98
Rossi
1722 fps ES 51.25
168 Keith 14.0 Old 2400, Starline Brass
Flattop
1289 fps ES 35.32
Rossi
1667 fps ES 80.95
168 Keith 15.5 Old 2400, WSP, Starline brass
Blackhawk
1392 fps ES 52.14
Rossi
1843 fps ES 36.43
173 grain Keith 358429 from Western Bullet Co.
15.5 New 2400, WSP, Starline brass
Blackhawk
1387 fps ES 58.14
Rossi
1869 fps ES 34.43
I’ve seen lot-to-lot differences that were greater than the Old vs. New. I’ll do the same with Unique when time allows. I actually expect to see a greater difference in Unique. This was just a chrono session, and no group testing was done, however, my normal load, the 14.0 with Leadhead 168, groups 2 1/2" at 25 yards from the bench in the 4 5/8ths Blackhawk. For younger eyes, it would probably group even better.
As promised previously, here are the numbers from the old vs. new 2400 test. There are flaws in the test. I started using mixed brass, which normally causes me no trouble, but there were some Remington cases in the can that were shorter than all the others, therefore, their crimp wasn’t as good and my extreme spreads widened. When I used Starline brass only, and the ES numbers improved immensely. Also, I started with my 4 5/8ths inch 50th Anniversary Flattop, but when I decided to test the original Keith/Lyman bullet, I found it was too long for the chamber. I then went to a 4 5/8ths inch Blackhawk. I also used the Blackhawk for testing Elmer’s original load of 15.5 grains, which every manual published today says is too stout. The 14.0 load is my standard load and is considered maximum by my more modern manuals.
This is what happened in my guns. All the loads were safe. None showed excess pressure. In MY guns. Work up slowly in YOUR guns. I DO NOT recommend the original Keith load. Use any of these data at your own risk.
168 grain Keith from Leadhead, 14.0 New 2400, mixed brass
Flattop
1206 fps ES 194.9
Rossi 20” Carbine
1676 fps ES 97.37
Same with Starline Brass
Flattop
1265 fps ES 64.98
Rossi
1722 fps ES 51.25
168 Keith 14.0 Old 2400, Starline Brass
Flattop
1289 fps ES 35.32
Rossi
1667 fps ES 80.95
168 Keith 15.5 Old 2400, WSP, Starline brass
Blackhawk
1392 fps ES 52.14
Rossi
1843 fps ES 36.43
173 grain Keith 358429 from Western Bullet Co.
15.5 New 2400, WSP, Starline brass
Blackhawk
1387 fps ES 58.14
Rossi
1869 fps ES 34.43
I’ve seen lot-to-lot differences that were greater than the Old vs. New. I’ll do the same with Unique when time allows. I actually expect to see a greater difference in Unique. This was just a chrono session, and no group testing was done, however, my normal load, the 14.0 with Leadhead 168, groups 2 1/2" at 25 yards from the bench in the 4 5/8ths Blackhawk. For younger eyes, it would probably group even better.