Have shot 3 elk w/ a .54 using 130 grs. ffg, .535 RB, .020 patch and all didn't require a 2nd shot. Ranges were 30, 60 and the last at a paced off 107 yds. This last one went 40 yds. after the shot thru the rib cage and the quarter sized flattened "ball" was found just under the casing in the opposite shoulder when cutting up the meat. Perhaps 130 grs. is slightly over loaded, but w/ this load, I could head hunt squirrels. Don't have any experience w/ moose but tend to think that w/ good shot placement {rib cage}, this load would be quite sufficient. Good luck.....Fred