Just got this in. Took 3 weeks from payment to casting. Thanks Tom! This is a 335 grain 502 cal boolit. The crimp groove is right at where you would crimp a Rainier 335 at 2.10". Mine came out a little light at 330 grains, but I am using a short aluminium gas check, and a touch more tin on this first casting due to what was already in the pot. I intend on using the same data as the Rainier. I expect I will need to bump up a tad on the charge. If anyone knows where I can get long .50 cal gas check please let me know. I think they may increase accuracy due to the increased surface area. This bullet does not have much bearing surface as is. Lots of room for grease.