hswaters
11-01-2014, 10:05 PM
I have some IMR SR7625 powder. I got what I could find and I am not knowledgeable enough to have a preference for any particular powder or manufacturer. I looked for reloading information when I got the powder and found a PDF on 10-4-2013 from IMR that said 230 lead, .451 dia, COL 1.270 min 5.8 max 6.2 gr, velocity 825.
Then recently I found another IMR specification that says 230 gr LRN, .452 dia, COL 1.200 min 5.5 max 6.0, velocity 897.
No mention of how long the bullet might be. I have a commercially made lead PC bullet that is .685 long and .451 diameter and some home cast Lee tumble lube bullets that are .661 long, .452 diameter. Both sizes may vary a couple of thousandths in length.
It sure looks like the first one refers to the commercial bullet and the second one to the Lee.
Winchester FMJ factory made are 1.262 COL
So I thought I would find out what you old hands think about this. Maybe you can explain how to be sure I have the right over all length as it appears that bullets of the same caliber vary quite a bit in length.
I am a poor old dumb redneck so please type slow because I read slow.
Then recently I found another IMR specification that says 230 gr LRN, .452 dia, COL 1.200 min 5.5 max 6.0, velocity 897.
No mention of how long the bullet might be. I have a commercially made lead PC bullet that is .685 long and .451 diameter and some home cast Lee tumble lube bullets that are .661 long, .452 diameter. Both sizes may vary a couple of thousandths in length.
It sure looks like the first one refers to the commercial bullet and the second one to the Lee.
Winchester FMJ factory made are 1.262 COL
So I thought I would find out what you old hands think about this. Maybe you can explain how to be sure I have the right over all length as it appears that bullets of the same caliber vary quite a bit in length.
I am a poor old dumb redneck so please type slow because I read slow.