PCS unattainable, build?

[tallsdyotehunter]

finding that Chassis seems to be the hard part, any ideas on cals and barrel lengths? I was thinking 6.5CM but seems like a waste of powder

[bearcatrp]

finding that Chassis seems to be the hard part, any ideas on cals and barrel lengths? I was thinking 6.5CM but seems like a waste of powder

The 300 BO or the 223 would be the only cartridge that wouldn’t waste powder. The PCS has weight that my 300 BO doesn’t raise up when firing. Any caliber above the 223 or 300BO would have serious muzzle rise.