I really like the 60 gr Aguleria 22 lr shells.The only problem they are very hard to find.You should try these they will penitrate like crazy.

Yep, quiet too. It's enough to make a fella wish he could get a rimfire tube with 1:10 twist to spin 'em up properly.

Tried them in two different S&W MP 15-22's and they were keyholing at 25 yards. Indeed quiet but probably best suited in bolt guns with a bit tighter twist.

If memory serves correctly a company by the name of Tactical Innovations makes a tight rifled 10/22 barrel specifically for shooting these "heavy" .22 bullets. As not having one of these barrels I cannot comment on quality or accuracy, but maybe this can help some one else to become a guinea pig. Hope this helps.

http://www.tacticalinc.com/blu...9d276ce6656809a50e09

I think Green Mountain makes a barrel for the 10/22 that is designed for them with a 1:9 twist.

LWD

What twist rate do you guys think you need to stabilize these?

I've shot them out of a 1:16 with no luck.

They shot out of my Stoger lugers fine and my Ruger 10-22 up to 30 yards.I have had awesome luch hunting up close with these .

1-9 is what they are supposed to use. I don't think Green Mountain makes the 1-9 for them any more. When they first came out some no name company made a cheap bull barrel for them that was 1-9. Possibly E.R. Shaw would make one?