Thanks guys, I have taken a number of buffalo but always jumpers or walkabouts. First time I got to plan one
Rdnck, I used some of Bob's KAL .442 in 60-1 alloy. They weighed 550 grs. Pushed 'em with 102.5 grs. of Kik 1.5. Patched with some tracing paper to approx. .449 or a smitch more. 2 - .025 cards and an 1/8 inch grease cookie in between, ingredients of Bob's recommendation. No compression.
It was a through and through entering the right front in the pocket just behind the front shoulder, took out the top of the heart and exited far shoulder/leg just about centered. She was quartered ever so slightly. Exit was just slightly larger than entry hole. So bullet held together well but did good internal damage.
A few breaths down the breech will allow seating of follow up loads. This gun is my designated hunting gun and really like it with these loads.
Kurt noticed one of my patches was coming out a little grey when cleaning rifle last time and he went and got one of his snowdrift bullets and showed me how bullets with soft alloys can slump. So I then patched farther towards the nose and the leading stopped and accuracy stayed the same. Kurt has a good article in the latest TASS on this very subject.
A special thanks to Dick Savage who took me in some years back and has spent a lot of time showing me the bPCR ropes. Thanks to Kurt for all his time and advice as well, Gussy and all the many friends I have made in BPCR as well for taking time to explain things to a newby.
Special thanks to BobW for helping me get into these tight PP Chambers and get them to shooting close to like the ODG's did. Thanks also to Orville for his input and advice on same. A great bunch of people and I know I have missed some!
I have used some 50-1 of Bob's same .442 bullets but a weight of 511 grs to down a jumper at 100 yards, with using this same gun and powder. Shot twice because wasn't sure where first shot hit. She went down quickly. Processor recovered those bullets against hide on far side. They retained 98% and 84% of their weight respectively. I did not get to see the carcass but processor who does a lot of work for us said they were where they needed to be and only about an inch apart. With that in mind I wasn't sure how these softer bullets would hold up at longer range. The one in the picture was shot at an even 200 yards.
These loads group well out to 400 yards off sticks, Minute of Heart on buffalo. When Kurt was here last, shot these loads on out to 805 yards and they did pretty well. Kurt's pocket knife marked all my elevation settings on my Shiloh buckhorn ladder sight

I did file a notch in the bottom of the ladder with slide up for 200 yard setting and filed the slide notch deeper as well. Filed the top of the front sight flat and face of sight to my liking also.
I bought one of the KAL .442 molds from Powder Burner at the Q, but Bob's bullets shoot so well I don't know if I will ever cast any
Rick