Pushing a 357 Max on SB1

[YRUpunting?]

So I'm wondering how much I should push my 357 Max on an SB1.  I using the SSP bullet (180 grs) over 20.0 grs of H110, small rifle primer, no crimp.  My average FPS is 1863 with a max of 1903 fps on ten shots. I printed the recipe from the Hodgdon website and it gave a max load of 21.0 grains.  Accuracy is OK, would like to see if more speed helps.  Anyone see a problem working up toward the 21.0 grs max?  Although I'll probably stop at 20.8 regardless.  Would a different powder be better for a lower pressure?
 
Thanks.

[Doublebass73]

I'd call Hodgdon and find out what the max pressure of that load is. The math is easy enough to do once you have that figure.

[revbc]

I've had my best accuracy with aa1680 and I think the pressure is lower.  There has been much discussion on the maxi with 1680, I think the max load is 26.0, but the factory guy said they stopped at this point because of case fill, not pressure. All this is from memory....................    So, do your research and even give them a call or email.

I shot my SB1 up to max loads consistently.

One of these are 1 gr over, so use at your own risk.

Bobby

[cwlongshot]

My first H&R maxi was a factory chambered MAXI in a M258. So mine is a pre SB1 receiver.

Load the cartridage for accuracy, up to the "book" max loadings and don't worry. That extra 75 or 120FPS you might get, going above max loadings, ain't gonna make the critter any "deader"...

Thats my 2 cents...

CW