56-50 Loading Questions

[paledun]

I have searched the SSS site for comments on loading 56-50 with a 300 grain bullet.  Finding nothing, thought I would ask if any SSS members have experience with this bullet or comments regarding my initial loads.  I was given a few 300 gr bullets sold by Buffalo Arms with their item number 512300.  The RNFP bullet measures .634 in length and .512 in width.  There is a crimp ring at .3 inches from the base which makes the loaded cartridge length 1.5 inches in length.  Comparing my reload to a original Spencer 56-50 cartridge shows the curvature of the RNFP bullet is similar to an original Spencer 56-50 rim-fire cartridge if the original's bullet's point was cut to provide a flat point.  Using Starline brass, a 34/35 grain load of 2F is compressed approximately 1/16 of an inch with the bullet inserted to the crimp ring.  Loading for the test firing will be over the top as the magazine follower is still the original for rim-fire cartridges.  My and a gunsmiths efforts have not be successful in removing the screw that keeps the follower in the tube so this problem is still to be addressed.  My questions are:  anyone have experience with the 300 gr bullet and if so, the powder load used would be useful.  Thanks in advance for the comments and advice.  Paledun