Yeah, if I wanted to work up another load for mine, I would look pretty seriously at the ET. I hear alot of great things about them and they mushroom in a more traditional manner.
That load you have at 3300 sounds like a screamer. Talk about a load you could anything with! Any details you could share on that load? I think I have a bag of the ET's laying around. Wouldn't mind experimenting some with them. Also, what kinda rifle are you using?
