My neighbor is buying an AR Grendel with an 18 inch 1-8 twist. He would like to come over and load some 120-123 hunting bullets good enough for hogs. I have on hand some Czech SRB 118 powder that is reputed to be the same as AA2520, also on hand is 4198, Varget, IMR and H 4895. Any suggestions on good starting loads and also max loads would be appreciated. Hog bullet recommendations too. If anyone has knowledge of this SRB 118 powder I would like to hear about your experience. It has worked well for me in .223/5.56, .30-06, and .308W.
After action report: We tried AR Comp and the Nosler ABLR 129 grain with not very good results. The only brass we used was Hornady once fired fl resized and Federal primers. Switched to SRB 118 (28.5 grains), and seated the bullets a little deeper 2.235 vs 2.250 and group size shrank to sub MOA with about 3 inches lower POI at 200 yards vs 100. Factory 123 SST shows pretty decent MOA groups, but we are early in the proceess and need to shoot more groups to see if the SRB 118 remains consistent. Chrony is out of commission so the velocity is unknown.