I just read the thread about Alliant 2400 vs hercules 2400, with various primers resulting in differing pressures. It refreshed in my mind my question regarding how most printed manuals recommend lower charge levels when using lead bullets compared to jacketed ones.I savy the possibility of leading and progressively increasing pressure as leading worsens, but wonder does the possibility of the lead projectile increasing in diameter under pressure increase resistance in bbl travel? I am casting 158g Lee gas check bullets sized .357 from whatever mixture I have in the pot lubed with some red stuff requiring about 100 deg. Never pure lead but some WW, some lino, some salvage with tin added. I like the HS 7 @ 10g as recommended by Hodgdon but with F100 std primer, and 15g IMR 4227 also std primer. My loads are not showing any bbl leading at all.

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