Hi
I have one of these also and it is an older model (1982) that in 1994 has been to the factory for a safty upgrade. And I can tell you that the older ones like mine are not as strong as the new ones, so if you have a older one stick with 130 gr pills with 25 to 28 grn of imr 3031, (work up with care), very acurate in my gun.
But every once and a while I do beef it up with 150 grn nosler partition point, std win primer and 30.0 grn imr 3031. Also very accurate, from a sitting sand bag 1/2" groups at 100 yrds. THIS LOAD IS HOT! and kicks like a mule so, be careful.
I only neck sise and seat the bullet so far out that I need to push it against the rifleing while loading.
If you want a fun jack rabbit / gopher round I have a 162 grn lee 309-160 lead with gas check that I use 14 grn of unique over a std primer. (start with 10 grn and work up). That bullet is listed as 160 grn but I use just wheel weights and after gc, lube and siseing it is 162