Just asking if anyone has used these?

I was thinking about trying them (to go w/ my 50 grain field points) I wouldn't have to do a lot of tuning between 3d/hunting set ups.

How far out would you all consider these to be lethal? I would imagine as far as Iam capable of shooting in the woods (35-40 yards).

just looking for thoughts/opinions. Would you think there would be penetration issues? I'd be getting around 60 ft/lb's out of them, I think.

thanks.