Lee the grenade thing is stretching things a bit. However, the spiking thing is accurate. You really need to pay attention to the reloading part and find something that will work, pretty easy to do actually. I spiked a load once and broke an extractor, not to big a deal especially if you consider the many hundreds of rounds I have reloaded and sent thru my 243WSSM upper and the thing still shoots amazing groups. Not a Dtech upper, just the run of the mill 20" Oly thang. I think the WSSM line is the best thing to come along for the AR15 platform. They feed and function perfectly, extremely accurate, and kill shtuff waaaay out there.