Victor: Hey, that is a really nice Destroyer Carbine. Mine is nowhere near as nice, in fact, it isn't really nice at all and doesn't shoot worth a dang, but it is fun to play with. I use 9x23mm brass and 38 acp load data - no problems with cycling, just ain't all that pretty....
Yellowtail - nice Mosin. You reported your accuracy tests in another post - not bad, but these rifles often shoot better with the bayonet extended, if your model has one, and respond very, very well to a good bedding job.
1marty: your Ishapore will also respond to a good bedding. I would not bed the barrel any farther out than the end of the chamber area and make certain the action is firmly bedded. You should also bed the rear stock and you should square the end of that stock where it sits against the action and bed that mounting area. It should shoot much better.