Texas Colt
Member
I have a question about reloading for the 45-70. I am an experienced reloader, but I can't figure out why I am getting such wide spreads in velocity. The gun is a Browning Saddle Ring Carbine with a 22" barrel.
For example, I shot a test load today that was 44.7 grains of Reloder 7 over a 300 grain Speer JHP. OAL is 2.540. Powder for each round was weighed individually. Here are the results of four shots...
1806
1727
1839
1877
As you can see there was a 181 fps variance. WHY? I have gotten similarly erratic results using IMR 3031 powder.
Any thoughts???
For example, I shot a test load today that was 44.7 grains of Reloder 7 over a 300 grain Speer JHP. OAL is 2.540. Powder for each round was weighed individually. Here are the results of four shots...
1806
1727
1839
1877
As you can see there was a 181 fps variance. WHY? I have gotten similarly erratic results using IMR 3031 powder.
Any thoughts???