I've got a Marlin 1895GBL. When it was new it would tumble 405gr Lasercast after about three rounds.
The bore was a bit rough and it was grabbing a lot of lead, apparently to the point the bullets were not getting enough spin.
I solved the problem by firelapping the barrel. I bought the Wheeler Engineering firelapping kit from MidwayUSA. I only used the finest grit (600), rolled 20 bullets in it, and shot them through the rifle, cleaned it goo, and that was all it took.
For the lapping rounds I used jacketed 405 gr Rem bullets. I scrubbed out all the leading before starting the lapping process.
