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ernie8 · January 31, 2019, 02:22 PM

I have been building bolt rifles and AR-15's to shot this cartridge for over 3 years . First it has a slight taper . It is not a rimless .357m , it is a necked up .223 . It performs best with 180 to 200 grain bullets . Any below 158 grains are not as accurate , do not work as well at distance and tent to over expand on game . It hits harder at up to 200 yards than the 300 bo or the 6.8mm . What it does is allow 30/30 performance , out of an AR-15 or a nice small action light bolt rifle with light recoil and muzzle blast . 200 = 2200 fps , 180 = 2300 fps , 158 = 2400 fps . There is a little more room for velocity as a .223 casehead and a bolt rifle or AR will hold more pressure than a T/C or lever gun . I do not go there as the accuracy and performance on game is fine at that level . It has been one of my more popular wildcats .

January 31, 2019, 02:22 PM	#5
ernie8 Senior Member Join Date: October 9, 2018 Posts: 217	I have been building bolt rifles and AR-15's to shot this cartridge for over 3 years . First it has a slight taper . It is not a rimless .357m , it is a necked up .223 . It performs best with 180 to 200 grain bullets . Any below 158 grains are not as accurate , do not work as well at distance and tent to over expand on game . It hits harder at up to 200 yards than the 300 bo or the 6.8mm . What it does is allow 30/30 performance , out of an AR-15 or a nice small action light bolt rifle with light recoil and muzzle blast . 200 = 2200 fps , 180 = 2300 fps , 158 = 2400 fps . There is a little more room for velocity as a .223 casehead and a bolt rifle or AR will hold more pressure than a T/C or lever gun . I do not go there as the accuracy and performance on game is fine at that level . It has been one of my more popular wildcats .