I use it in my 1919A4. That 250 round belt would be good for about 8 minutes of shooting fun. I am sitting on about 25000 rounds of the stuff, but I limit my range outings with the gun so I don't run out.
Only regret? I should have bought 30,000 more. I was paying $260 for a case of 1750 rounds on belts, and another 7 small boxes with 10 tracer rounds in each. Each case had 7 belts, which, if sold for salvage after firing at $20 a belt, means a total outlay of $120 for 1820 rounds. I believe that works out to about 7 cents a round.