I actually talked to Jim Clark about building me a Remington 7615P Pump Action 223 Patrol Rifle, and re-barreling it for 300 whipser, but the action is so loud I figured what was the point? I just wanted the pump action to get the .233 spent case out.
I would love to have a 300 whisper bolt gun, but ultimately EVERY TIME I sat down to do the math an integral 77/44, or DeLilse wins out. Proove me wrong and I'll buy you a steak dinner.
My 18" Savage with AWC Thundertrap and EBR Thumper is the closest thing to silent I have ever heard. It sounds like someone opened a 16" soft drink about 15 feet away after it had been shaken - then you hear a clank a second later.... so there's really no need to waste that can on a different host weapon.
Honestly, I'm about to get my 3rd can - and unless I become wealthy, probably my last for a while.