I have a new Marlin 1894 in 45 Colt, the action will feed the 300 grain LBT style bullets but they chamber hard. The round shows that the rifling engraves the nose of the bullet .134 above the rim of the case. The 265 grain work well but I think I would like to use 300 grain bullets also. I can have the chamber altered to take the 300 grain bullet but my question is would the 1-16 RH twist stabilize the 300 grain bullet and if it didn't would the 265 still shoot good after I had the chamber altered. Appreciate any help I can get.