Ok, here is what I was trying to see if someone would say. Most of the guys in Ky I hunt with use FFF in there rifles. They do it cause they claim there is no delay in fire when thier cap goes off. But one used over 130gr and ended up with some damage somewhere. I don't know the details as I wasn't there. But they used it very half hazardly. This was the same guy using two balls separated by a patch. Swore he did it for years. So with all that wieght in two balls and 130gr of FFF, I think that was the edge. I wasn't aware that some rifle makers actually calls out fff recommendatons. I am used only to using it in my pistol. Learn something everyday.