Thanks for the replies Gents! I will step up to 18 or 18.5 and see if that resolves the blow back, I'm thinking it will. I have also had similiar blow back (not to this extent) with the Hornady FTX 225's. The grouping at 50 yards was exceptional with the 17.5 grains, so I was all smiles. The FTX's at 100 yards group much better then I'm able to shoot, so I was very pleased with their accuracy. I have to admit, it was very pleasnt to shoot these mild loads, but am interested in testing some loads a little more stout as I build experience and a better understanding of handloads. Thanks again for the assistance, I'll keep you posted. Thanks, Gingus