My buddy just got a Lee Deluxe pistol die set in .40SW - 10mm. It specifcly states "Do not use reloads in GLOCK or simular guns with chambers that do not fully support the cartridge. Due to the intrusion to the feed ramp." He has shot 100s of reloads he bought from gun shops through his GLOCK and has never had a problem. Whats the difference? Is this a liability thing or should he just shoot factory rounds for his own safty? Return the die? We are both pretty new at reloading and could use a little help. Thanks.