All, I had a good and surprising experience this weekend with Monarch ammo in .308. Monarch is a Steel cased, steel projectile product that I got at a local sporting goods store to try b/c it was relatively cheap. I think it come from Checz republic but am not sure. Anyway, ran a couple of 2oo rd belts brass cased venezulan surplu (btw, great ammo)through F/A 1919, then let it cool and them ran a 200 rd belt of Monarch through. No problem what so ever. I will continue to experiment, but I like the stuff so far.