cooper wrote: Fri Jun 09, 2023 12:48 pm
Recently started reloading 44 mag to shoot from a Rossi 92 16" barrel and a Super Redhawk 4" barrel. I bought Missouri bullet 240 grain lead RNFP 0.430 diameter, BHN 18. I'm loading what I intend to be mid-power loads and am wondering how to tell if I'm using too hard of a bullet.
Only powder I could get my hands on when I decided to start loading during the pandemic was Universal. Bought it. Didn't use it. Now I'm using it.
Went to Hodgdon and looked up loads for 44 mag 240 grain. They listed one for 240 grain lead SWC (I'm using RNFP):
- Starting Load: 6.5 grains -- 852 fps -- 11,700 CUP.
- Maximum Load: 10.2 -- 1276 -- 37,500 CUP.
This load data is generally in line with data from my Lee reloading book, which refers only to lead cast bullets without specifying shape (SWC vs RNFP).
So, I started loading at 6.5 grains, then 7.5 grains, 8.5 grains, and 9.0 grains.
Seems to be performing okay. How many mistakes am I making here?
Doesn't look like you're making any at this point. As long as your loads are shooting well and to where you point them, and as long as your gun is not experiencing lead-fouling, you're probably OK. If, however, you do experience lead-fouling, then I would suggest my above tips,
It's very likely that your Missouri Bullet 240gr LRNFP's are just the right diameter for your gun's chamber and bore. If so, that's going to help a good amount, even with that hard-cast alloy. With sucn a relatively harder alloy, I would tend to use something close to a max load to get obturation. It took about 30K to 32K PSI to get obturation with BHN 15-16, so BHN 18 likely is getting it at around 34K to 35K PSI or so.
That's one of my sources as well; Glen Fryxell provides a wealth of good information on "boolit" casting. I learned a lot from him, too.