Re: Bill & Lerch\'s \"APS Xtreme Range 338 Allen Mag\"
Sorry to make another post. I should have included this in the last post.
You guys are talking about fireforming with cornmeal. I don't want to sound like a killjoy, but I would highly recommend against that. I mean no disrespect at all, but this is not a good idea. For the price of some junk bullets to use for fireforming, it still beats using cornmeal to "beadblast" your throat. I have seen what cornmeal does to throats under a borescope and it was ugly and that was on a case shooting less than 30 grains of powder not over 100 grains.
Remember, copper is a guilding metal and in and of itself does not harm barrels. That is one of the reasons why we use it. Cornmeal can be effectively used as media in a beadblaster machine. I have one friend who used it to mediablast his roll cage on his hot rod before powder coating! This is what you're doing to your throat only instead of sending cornmeal across a part at 300 fps, you are sending down the barrel at over 1000 fps! For the price of some junk 338 bullets, it is minuscule compared to the cost of all that beautiful machine work and huge barrel.
Heck, I've got some extra 300 grain MK's laying around that I'll never use because they were out of spec bearing surface wise and you guys are more than welcome to them. I would even pay to ship them to you just so I could sleep easy knowing copper was going down that awesome barrel instead of cornmeal!
If it's not far, it's boring.