Erik Cortina said:aj300mag said:Erik Cortina said:Phil3 said:I think Savage uses the floating bolt head on all actions. ??? If so, they use it on a 375 H&H, 375 Ruger, 338 Lapua Mag, and 338 WinMag. Those are pretty hard hitting. But, am ASSUMING the floating bolt head is used on those calibers. If NOT used, that would call into question the strength of the design.
Phil
Phil, bigger cartridges do not have more pressure, they just shoot bigger bullets and hold more powder.
It's like a car tire and a tractor tire. A car tire usually hold 45 psi. while a tractor tire is about 20 to 30 PSI. Size does not determine pressure.
Erik they may operate at the same pressure the larger cartridges will have a higher bolt thrust due to the larger surface area for the pressure to act on.
Possibly, but the brass also has more surface area to grip the chamber walls.
The point is, that the big mags and the smaller cartridges are not that much different on the stress that they apply to an action.
There's a world of difference between the bolt thrust of a .223 Remington and an Ultramag/Short Mag case. Tis the actual force in pounds that hammer the bolt lugs. Brass gripping the chamber is irrelevant, the force is the pressure against the cartridge head internal surface area...
Bolt set back...