HELP!! 7mmLaser?????

I have recently aquired a Remington XP100 that was a 7mmBR Rem> It has been changed to 7mmLaser. The Company that did the work isIron Sight Gun Works Inc. And the name Ron Denton is stamped on the barrel. Can anyone tell me anything about the caliber or the company? I know if I cannot find any info I will have to have a chamber cast made to determine cartridge dimensions.