Only 1 out of 5 hit the target at 100 yards from my 1:7 twist 223. Others came apart. Switched to 50gr Hornady V-MAX and all was well.
with a one in 7 twist, they are only spinning at twice the RPMs they are designed to take....
Speer does make a 55 gr TNT/ HP, that is designed for the 22.250 and the Swift....
Those might do better holding up in a fast twist 223..... they are available in the 1000 pack...
The 52 grain HP ( locally called the bucket mouth 22 ), can be driven harder than the 50 TNT....
They are pretty explosive on sage rats and prairie dogs...
