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Thanks for the replies. The firearm is a Rem. 700 w/ 7:1 twist. There were some lead shavings on the patches when I cleaned it. Makes sence. I'll stick w/the harder alloys & try some heat treating...

I've been working trying to develop an accurate subsonic load for the 300 AAC Blackout using a cast boolit. I'm trying to match what I had developed for Sierra 220 gr. JRN ~.75" at 50 yrds. I've...

What's the best way to determing the "throat" diameter? I have a supply of the "Chamber Casting Alloy" form Rotometals. Would I do a cast of it and measure at the proscibed time? Or, is there a...

I'm looking for recommendations of what boolit mold diameter to buy and what sizing die (Lyman) to use with it. This is my first "real" try at getting BP loads in my Pedesoli Sharps 45-70 to...

I wasted allot of time trying to get the Lee TL309-230-5R to shoot in a Remington Mod. 700, 300 AAC caliber with a 7:1 twist barrel. After a couple failed attempts, I examined some of the sized...