INTERESTING! Thanks fellas! My .223 is an early 90s model. Believe it or not, it is a 1:14 twist! For a long time I thought it was a 1:12 which I guess was pretty standard at one time. But a local reputable smith told me it was a 1:14. Skeptical, I had just purchased a good cleaning rod. He told me what to do...and sure enough...

Having said that, with 50 and 55 Gn. bullets it is VERY accurate. I have not tried heavier bullets but was told that I'd need a 1:10 or better (faster) to stabilize the 60+ Gn. bullets.

I will keep those TNTs for paper punching. DRAT! Was hoping to blow up some little defenseless critters this spring with 'em! Oh well; I got a good stock of .224 V-max in 50 and 55 Grain bullets.

Brian