Re: Just ordered my McMillan A5!
Nhassey,
Actually we don't call it "lead injection", we just use lead shot mixed with epoxy pour it in the shell before filling to add weight in various places. Quite a few people ask us to fill the butt with solid glass or a lb or 2 of lead shot in the butt to counterbalance a long heavy barrel.
Also, for those who caught my "clamp bar" reference above, at the first of this year we changed our standard intergral cheekpiece riser from the old cylinder and post with two thumbscrews to a clamp bar on the two posts with a single center screw. It is basically similar to the KMW unit but uses our standard cheekpiece riser so the lateral adjustment is accessible from the top of the cheekpiece like it always has been. It is still ambidexterous, and the clamping parts inside are just two stainless 1/4x20 square nuts, one with the threads drilled out, that are replaceable from any local hardware store if you lose one. Also, the thumbscrew can be replaced with a standard 1/4x20 socket head cap screw 3/4" to 1" long available at said local hardware store if you don't want the thumbscrew protuding from the side of the butt.
We used our old system for many years with not too many problems, but with more and more of the big magnum calibers being used we were getting more complaints. We finally figured out that with the sharper heavier recoil impulse, the aluminum post was deforming where the point of the thumbscrew was bearing on it. You could tighten it up and in a few hundred rounds the aluminum would start to deform and get loose again. The clamp bar system has been around since the horse and buggy days and seems to be bullet proof against metal deforming and getting loose.
