Browning 1885 BPCR

[Martini2]

Robert L, You have an interesting paradox with current bullet / bore fit.
In order to pick up a little velocity one could try 3F powder. However that will burn bit hotter and dry fouling so more lube or blow tubing and even possible moist patching bore between shots would accompany 3F. We have an real GURU names Kurt on the site. He has done extensive study on gas cutting of bullet bases etc. It would take very little damage to last driving band on bullet base to cause some down range phenomena. Might try to retrieve a bullet fired into back stop. Since load is already using all available space trading your fiber 0.060" wad for a Poly wad (more durable) material might preserve the flat base. Last take peek at the compression tooling. When putting pretty good pressure down on powder column the tool surface doing the pressing needs to be perfectly flat. If domed it will leave a ring around the edge for bullet base to sit on. This may effect the sealing of hot gases. The devil is in some of these details. Best of luck on the range outing.