45-90

[Kurt]

Steve,

I been shooting the 2.4 Shiloh and CPA now for several years after retiring the .50 and it does well for the gong and 1000 yard shoots.
I would suggest loading ladder loads, zero compression to as much as you want to compress even filled to the top of the case, but this is usually not necessary to use this much powder.
I have used Goex 1F, 2F, and 3F for this caliber with good results but not as good as using the OE or Swiss. I have the bullet you mention as well as a Brooks and Paul Jones but those two have a blunter ball Hemi nose, I like using the blunter nosed bullets over the sharper nosed.
But I seldom find a good group with the OE or Swiss with more that about .120 +- compression. The Goes, now this was with the regular 1F I got the best results with about .300" compression than when the Goex express came out it had several different compression amounts that worked well.
I dont stick with a particular weight, this usually changes per every lot change usually. It don't matter if it's swiss or what ever powder. My last load I used with the OE powder was 82 grains that gave me .128" compression.
All I can tell you and that is do a 3 Shot ladder load increasing the powder one grain for the next three shots till you find the null you're looking for. Start at zero and work your way up 1 grain for three shots and usually you will see what can be tweaked out better with about 21 shots fired. Dont get your mind set on a particular powder weight charge. That will change from lot too lot or even a different rifle it gets shot in