I ran my .375 up to 2,800fps without leading and achieving 1 1/2 MOA using the 250gr. RCBS bullet right at .376". I used WW bullets heated to 5 degrees below slump, then quenched. Supposedly they were harder than 30 brinel. I also used LBT Blue for lube. Not a spec of leading in 30 shots without cleaning.

Up to 2,000fps in .45 and .50 cals. I use straight Canadian WW with Lyman's Moly lube (not the old black Lyman pistol lube with graphite- it's garbage, ihmo). No leading with the moly, but it's messy to apply. Isopropyl alcohol helps remove it from fingrs. Bullets are sized .459".

Apparently the WW in this part of the Province run brinel 12 to 13. They are quite hard compared to other places, I'm told. I have seen listings as low as brinel 9 back East in the States. There is no Zinc or pure lead in my alloy. All stick-on weights (pure lead) are removed before melting & we don't have zinc weights yet - as far as I know. Zinc will destroy your entire melt and there's no way to get it out of the melt. Zinc WW have a "Z" on them & are probably large for their weight. I'm still shooting WW I gathered up 25 years ago - many hundreds of pounds at that time. Still have over 100 pounds of them.