This gets brough up a lot. I do not believe there would be much difference in the mushrooming between pure lead and WW. I actually believe that very few people actually cast pure lead. I have had several experts tell me there is no such thing as "PURE LEAD". They say all lead is alloyed.

There are so many variations in modern MZ barrels as far as bore and land size in concerned. So to blankly say that one bullet would or would not fit has far too many variables involved.

There are very minor differences in bullets cast from different alloys. I shoot WW in BP rifles all the time. I would be careful with WW if I was shooting it in an antique rifle with cheap steel, but modern steel does not have a problem with WW. We have argued this before, and probably will again.

IMO you will have more variations with your Lee molds than you will with the alloy. If you were using a more expensive, custom mold, with tighter tolerances, then there may be a difference in the sizing of your bullets. But it sounds to me as if you are not going to be sizing your bullets, so you are going for a hit or miss situation to start with.

You may be able to play around with your alloy a bit to get a better fit. Have you slugged the barrel??? Tom.