JFE - that's an excellent article. I save it to my loading folder. TKS. It shows my 44mag pressure .45 Colt loads were right in line and actually a bit softer, probably never over about 30,000 to 32,000 CUP.

The 38" twist .45 Colt I had did shoot well with 300 and even 340gr. Cast bullets - at over 1,700fps using 680 - but, I always worried about bullet stability after impact. My idea was that they're being just barely stable, they'd likely tumble - less so with a 300gr. than the 340gr.

Held hard with both hands, resting the left on a bag, it made many 1 1/2" 5 shot groups at 100 meters.

A fun gun to shoot. The 260gr. Speer at 1,960fps made for an interesting load- bear, deer or even moose. The 300gr. HP was my choice for 2 Elk.