For an experiment 
to test the ventilation limits at my club's indoor range, I loaded up ten .357 Rem Mag cases with pyrodex, a milk-carton wad, then a dollop of pine-scented Bore Butter filling the hollow base of lead wad cutter. The latter were 'Zero' brand, no grease grooves
, and seemed to be lubed with graphite. They seem to work OKwith my usual light smokeless target load of 3.1 gr HP38.
Fired off the experimental rounds in a S&W 686, and got the anticipated fireworks and smoke. After all 10 shots, the barrel was pretty fouled. Easy enough to clean, but I think the lesson here is to use bullets with grease-grooves, so there's a better distribution of the Bore Butter. Anyway it's not something I plan to repeat with that setup. The test of ventilation was successful. Smoke was evacuated quickly, and the 20-yard target remained clearly visible at all times (slow fire).
to test the ventilation limits at my club's indoor range, I loaded up ten .357 Rem Mag cases with pyrodex, a milk-carton wad, then a dollop of pine-scented Bore Butter filling the hollow base of lead wad cutter. The latter were 'Zero' brand, no grease grooves, and seemed to be lubed with graphite. They seem to work OKwith my usual light smokeless target load of 3.1 gr HP38.Fired off the experimental rounds in a S&W 686, and got the anticipated fireworks and smoke. After all 10 shots, the barrel was pretty fouled. Easy enough to clean, but I think the lesson here is to use bullets with grease-grooves, so there's a better distribution of the Bore Butter. Anyway it's not something I plan to repeat with that setup. The test of ventilation was successful. Smoke was evacuated quickly, and the 20-yard target remained clearly visible at all times (slow fire).
