I've been using 45.2 gr. of h4831sc in front of a cci200 primer without any pressure signs. I've also tried r-22, H414, and H4350. All of them very accurate right at 3000 fps out of my Rem 700
I just for the heck of it went out to the hodgdon web site and this is what they have to say. They are using @50,000 c.u.p. which is really mild. I'm probably closer to 54,000
100 GR. SPR BTSP
COL: 2.650"
H1000
47.0 C
3000
49,800 CUP
H4831
42.0
2924
50,100 CUP
H4350
40.0
2973
51,000 CUP
H414
40.0
2963
50,600 CUP