Sorry for my vague reply. I was just saying that logic dictates I should be able to easily achieve 1000 fps with fast powders like TG and m1 bullets. I just don't have the experience with such small charge weights in a larger case to know how "safe" it is. 800x is rather bulky which might help take up some of the space but it seems like it's probably still a little slower than ideal. I guess I'll give TG a go and see what happens.
This is purely a low cost, low recoil, quiet plinking load using cheapo plated bullets. I have other, much better, loads for hunting and the like.
I'll have to look into that XTP idea though. It sounds promising.
Thanks for the info. I'm still rather new to 300 blk reloading and couldn't find anything like what i was looking for.