Does anyone have any info on these?? I am currently building a long range elk/mule deer/deer/etc. rifle, going to build it off of my 300 remington ultramag., i am going to get a hart barrel with more than likely a straight taper, fluted and have my gunsmith here locally turn the eliminator to the dia. of my barrel. I would like some insite to this product, my 300 kicks the heck out of me, gotta get that to stop!!! Thanks for the help.