I gotta ask you original Marlin 38-55 shooters out there a question. I have two Lyman bullet moulds, one that drops a 250gr plain base bullet, and one that drops a 271 gas check. They are the two bullet moulds still made now for this caliber. In two Marlin 1893's I have, the 250gr bullet with 21gr of 4198 or 28gr of 3031 shoots poorly, like 5 inch groups at 50 yards! The heavy gas check bullet shoots darn near into a ragged hole at 50 yards with those same two loads! Both bullets sized to .377, as my old guns slug out about .376. What the heck is going on? Is my 250gr mould defective? I am wondering, as isn't that 250gr Lyman plain base bullets as normal as you can get in this caliber? Why would the heavier bullet shoot SO much better? Anyone have experience with this bullet in their old 1893 Marlin? Any help greatly appreciated, as I am stumped on this one. Oh yeah, I have some Hunter's Supply .376 265gr gascheck bullets that shoot well in these guns also, so do Marlin 38-55's just like heavy bullets? .