Could someone look and tell me what the max load is in the sierra reloader book for a 175mk using reloader 15 in the 308 case?

It isn't Sierra...but...

RL-15 From 35.7 grains to 42.2 grains
Remington 9-1/2 Primer

308 Win

175 MK Load
43.5 of RL 15
Fed 210 match primers
Fed GM Brass

This is a 2600 FPS load that is loaded in the Military M118LR Sniper Load. I use 44.0 with my 180 grain Nosler Part. for hunting.