Vern Humphrey
Member
I have a Ruger Blackhawk that just won't shoot -- I've even had it throated.
Finally I got to thinking -- the original .45 Colt loads used a hollowbase bullet. I started looking for one and found it -- the Lee 298 grain Modern Minnie Ball.
Ed Harris and I had a long exchange on this -- would the longer minnie ball shoot well in a handgun? Would it take up too much space in the case and raise pressures? Would too light a charge fail to expand the skirts?
I have graphed data from the Hodgdon manuals and site, and found that for almost all powders pressure, velocity and charge tend to be linear functions. It should be possible to interpolate a safe and effective load from that.
I finally settled on 12 grains of Li'l Gun and used liquid Alox as the lube. My graphs predicted about 10,000 CUP and about 975 fps -- from a 7 1/2 inch barrel with a "normal" 300 grain bullet. How would the minnie ball do?
The results are now in -- 2" groups at 25 yards and velocity (from a 5 1/2" barrel) of 875 fps. Recoil was quite manageable.
Of course, it shoots 6" high, compared to the control load of a 255 grain bullet loaded ahead of 16 grains of Li'l Gun, but hey, the Blackhawk has adjustable sights.
Finally I got to thinking -- the original .45 Colt loads used a hollowbase bullet. I started looking for one and found it -- the Lee 298 grain Modern Minnie Ball.
Ed Harris and I had a long exchange on this -- would the longer minnie ball shoot well in a handgun? Would it take up too much space in the case and raise pressures? Would too light a charge fail to expand the skirts?
I have graphed data from the Hodgdon manuals and site, and found that for almost all powders pressure, velocity and charge tend to be linear functions. It should be possible to interpolate a safe and effective load from that.
I finally settled on 12 grains of Li'l Gun and used liquid Alox as the lube. My graphs predicted about 10,000 CUP and about 975 fps -- from a 7 1/2 inch barrel with a "normal" 300 grain bullet. How would the minnie ball do?
The results are now in -- 2" groups at 25 yards and velocity (from a 5 1/2" barrel) of 875 fps. Recoil was quite manageable.
Of course, it shoots 6" high, compared to the control load of a 255 grain bullet loaded ahead of 16 grains of Li'l Gun, but hey, the Blackhawk has adjustable sights.