I had a Trapper 16" bl. in .45 Colt. I found RP brass to be the strongest and best suited to the feeding throat of the Trapper. The others, including Ww and Fed were not as strong in the web.

I ran .44 mag pressures (as Per Ross Seyfried's replacement loads), which gave 1,584fps with 300gr. HP and solids form my carbine. Accuracy was sub 2" at 100 yards, but you had to hold onto the rifle with both hands as in offhand shooting. If not, it would jump and make vertical groups.

I shot 2 elk with that load, which incidently, duplicates the .45/90 BP factory black powder load.

I also developed loads using a now discontinued W680 powder, perhaps still available in some gun shops as H116(re-labled W680). Some Hodgdon employees do not know of this, while others do- depends on whom you talk to. Hodgdon bought the remaining WW680 stock(several tons) before buying WW powders, and re-canned and labeled it H116.

My data developed the same case web expansion as the .44 mag. presure loads, but beat the previous W296 loads by 200fps & used 340gr. bullets while doing it. That put that little 16" .45 Colt in the same ball park as the Kynock .450 #2 Musket ctg.

Terrific little round, even with just W296 Duplication laods. Remember RP brass due to the tough feeding ramp. WW brass is of no use, Federal only slightly better. RP was the best. I do not know about Starlane or Starline.

I should have kept that rifle, but will one day buy another, but with a 20" bl.

I kept my data.