Obturation
Member
Hey all,
I'll warn you ahead of time, this is a dumb question (maybe?).
I've used several pounds of trailboss in 45-70 and 45 colt/454 casull in the last couple years and I'm familiar with the calculation for charge weight.
I don't typically check for a published load when working with trailboss , I just hold the bullet I want to use up to the case at seating depth and put a mark on the case where the base of the bullet is, fill the case to the mark, weigh it and reduce about 15% and then work up generally to 95% fill and call it good.
So today I decided to put together some 325 grain wfn hi-tek coated MBC bullets in once fired winchester 454 casull cases for use in a SRH. Did my calculation and measurement , no problem . by my calculation about 8.5 grains was 100% fill. I reduced the charge to 8 grains and loaded 40 rounds with a rem 7 1/2 primers. No problem. I confirmed that the charge wasn't compressed by shaking a couple finished rounds to hear the powder rattling around in there and was satisfied and figured I'd test these out and adjust from there as needed. Pretty normal stuff.
My concern is that I looked at hodgdons site just to see if they recommended a charge just as an after thought. For a 325 grain lfn they show a max of 7 grains. Looked at data from lee, showing a generic 325 grain (doesn't specify bullet shape) lead bullet and they show a max charge of 7 grains as well. So I went back to the loads I just produced and gave a few a shake and sure enough, the powder is loose in the case, definitely not compressed. I'm under the impression that as long as trailboss isn't compressed it's essentially safe.
I'm just wondering if anyone else would be concerned about this? Hodgdons shows at 7 grains a pressure of 23,700 cup ( a little over 1/3 of what the max pressure rating of the cartridge is) and a SRH is a pretty stout revolver so I'm really not worried about a kaboom , just wanted to know if you guys do something differently than I do. I really don't think it's nessescary to pull these rounds down and re-do them but since I have the wealth of knowledge known as THR at my finger tips I'd see if anyone here would be concerned with the over book load I made thinking I was being conservative but actually going a full grain past listed max.
Second guessing myself isn't something I'm prone to but I just want to be safe and not tempt fate.
Any info or input is appreciated. Thanks!
I'll warn you ahead of time, this is a dumb question (maybe?).
I've used several pounds of trailboss in 45-70 and 45 colt/454 casull in the last couple years and I'm familiar with the calculation for charge weight.
I don't typically check for a published load when working with trailboss , I just hold the bullet I want to use up to the case at seating depth and put a mark on the case where the base of the bullet is, fill the case to the mark, weigh it and reduce about 15% and then work up generally to 95% fill and call it good.
So today I decided to put together some 325 grain wfn hi-tek coated MBC bullets in once fired winchester 454 casull cases for use in a SRH. Did my calculation and measurement , no problem . by my calculation about 8.5 grains was 100% fill. I reduced the charge to 8 grains and loaded 40 rounds with a rem 7 1/2 primers. No problem. I confirmed that the charge wasn't compressed by shaking a couple finished rounds to hear the powder rattling around in there and was satisfied and figured I'd test these out and adjust from there as needed. Pretty normal stuff.
My concern is that I looked at hodgdons site just to see if they recommended a charge just as an after thought. For a 325 grain lfn they show a max of 7 grains. Looked at data from lee, showing a generic 325 grain (doesn't specify bullet shape) lead bullet and they show a max charge of 7 grains as well. So I went back to the loads I just produced and gave a few a shake and sure enough, the powder is loose in the case, definitely not compressed. I'm under the impression that as long as trailboss isn't compressed it's essentially safe.
I'm just wondering if anyone else would be concerned about this? Hodgdons shows at 7 grains a pressure of 23,700 cup ( a little over 1/3 of what the max pressure rating of the cartridge is) and a SRH is a pretty stout revolver so I'm really not worried about a kaboom , just wanted to know if you guys do something differently than I do. I really don't think it's nessescary to pull these rounds down and re-do them but since I have the wealth of knowledge known as THR at my finger tips I'd see if anyone here would be concerned with the over book load I made thinking I was being conservative but actually going a full grain past listed max.
Second guessing myself isn't something I'm prone to but I just want to be safe and not tempt fate.
Any info or input is appreciated. Thanks!