If one is only getting 2800 from a 270 with H4831 and a 150, one needs to either add more powder, or replace the barrel on the rifle. Perhaps both.
As Seafire said, you can not get enough H4831 in the case to hurt anything with a 150. Fill it up to the top and listen to the kernels crunch as you seat the bullet. Been there, done that with the '06 and 190s.
Seriously, Hogdgon #26 says 150 gr bullet, 58 gr H 4831 at 3015 fps and 52600 CUP.
Nosler #8 says 55 gr H4831 for 2900 fps.
With my experience, if using only standard cup and core bullets, I would be looking for 2950 fps with 150s and H 4831. I would bet the primer pockets would be good for ten reloads.
If loading mono-metals or partitions, I would call 2850 fps good enough.
I get a lot more than just 10 reloads out of brass fired with H4831SC in either 270 or 06.
Just to prove a point, I've gotten over 25 reloads out an 06, with the primer pockets still tight, with loads of 62.5 grains of
H4831SC and a 220 grain bullet, or 65 grains with a 200 grain bullet. Non Magnum primers used. Will tell ya this tho, the load is full enough, if it is NOT CRIMPED, it'll back right out of there as the brass decompresses. With a 220 grain, the velocity hovers around 2950 to 2975 depending on brand of brass used.
If anyone remembers when I posted this long ago, I was getting flamed all over the place., for like 20 pages. That was until "Mike" from Nosler logged in and supported my findings. I was being asked if I had a pressure measure, which was NO of course.. so the first thing they did, was do the same to "Mike". His answer, why yes I do, I have an entire pressure lab available. He left his phone number with an invitation to anyone who wanted to call him on the subject. I noted it was a 541 area code here in Oregon. So I called it, and the secretary answered it "Nosler Bullet How May I Direct Your Call?"
That 20 page long thread of flaming me, was on page 3 in about 48 hours after that. " Mike " at the time was the Chief Ballistician at Nosler. He asked how I came to know what I did, and told him I had just worked it up at the load bench, when someone had asked what was the max velocity capable out of an 06 with a 200 grain bullet. I thought about it and decided to find the answer out for myself. Consulted some reload manuals and noted the pressure posted on regular loads ya see, and noted it was a good bit lower than what max SAAMI specs were for the 06. Did the 270 next, but no one questioned that after the end results of the 06 thread.
So there ya go...
