I've come to own one of the small ring Swedish Gustafs 96 actions rebarrelled to 308 Win. by Kimber back when. So this string about 180 gr. in the 308 is of interest to me.
Mine is quite accurate with 150 gr. Horns at ~2600 FPS, but I've been warned by somebody who may not know his stuff to avoid higher pressures or heavier pills with this action.
Are there known upper safety limits to this action I should be aware of?
It sounds like you are asking if your 150 gr Hornady load is safe, and about any warnings about pressure that is too high.
I am a firm believer in the KISS principle. SAAMI suggests 51,000 PSI for the Swede, so I would go with what the experts are saying.
I crunched the numbers using 2600 fps and a Hornady 150 gr. SP 3031 bullet, Re 15 powder, COAL of 2.800 inches. The computer tells me that your load is mild. About 43000 PSI. Using the information I plugged in, and because it is accurate, you have a winner. This is only a computer generated estimate, but having shot a lot of 308 in competition and hunting, it will only be out 1,500 psi at best.
With a 180 gr. bullet at 51,000 PSI, I would be happy with 2400 to 2500 fps.
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