I'm working with a buddy of mine doing some experimenting now
he got in some 145 and 135 rounds this past week and we loaded them with win 231 and went from 3.2 grains up to 3.7
The 145's with 3.2 felt like .22's, if they make a PF of 130 ....that's my round.
the 135's with 3.5 were also very nice. We didn't Chrono them yet , but I've gotten some rounds from JJrAmmo in CT recently and shot a couple of matches with them.
he rolled me 147's that went at 890FPS with a 130 PF. I love em! if we can reproduce what he made for me ,we'll make a few thousand rounds of them.
We've got a lot of the 135 bullets so we may focus on those first. 3.5-3.7gr of the 231 felt great , we need to check PF on them though.
(we're using these red rounds , he calls them "lipstick rounds")
Now that I'm getting used to using "tuned rounds" the stuff off the shelf feels super hot to me (I usually shoot S&B 124)