Does the 6mmAR Turbo 40 Imp. Cartridge Feed and Function In An AR-15?
Yes! The cartridge feeds and functions well in an AR-15. I am not sure why I am asked this so much but recently it seems to be the most asked question. It seems the question relates to whether it will feed out of a magazine with a 40 degree shoulder angle (vs the 30 degree angle of the 6mmAR). I believe when people are asking that question they are assuming that the shoulder of the cartridge somehow guides the case up into an AR-15 and that the steeper shoulder angle may present a problem. What I quickly found out after making the first prototype upper for the cartridge and shot it a while was that in an AR-15, the shoulder of the Turbo 40 (or the 6mmAR for that matter) normally does not contact with the feed ramps in that manner so as to guide the bullet into the chamber. What typically makes contact (if anything) is the corner edge at the junction of the shoulder and case wall of the case, which suggests one could make the shoulder angle even 45 or 50 degrees without issue (but I am
