The box says it is designed for 1:9 or slower. I think Ammo Oracle says that tnt and blizkrige can twist themselves apart, but its been a few years sense i read it last.

I have a large stockpile of this ammo which I use for coons and the like. Its extremely accurate and exhibits explosive fragmentation, plus its cheap. The velocity is high and the jacket is thin and shooting it out of a 1/7 barrel will cause the bullet to spin apart. I tried it years ago, for grins and the bullets flew apart shortly after leaving the muzzle. Probably not dangerous, but it could be.
Don't waste the time/ammo, 1/7 barrels will spin these rounds apart.

I shoot it in a 1/8 and it is good to go.  In fact, it is accurate as hell.

Quoted: I have a large stockpile of this ammo which I use for coons and the like. Its extremely accurate and exhibits explosive fragmentation, plus its cheap. The velocity is high and the jacket is thin and shooting it out of a 1/7 barrel will cause the bullet to spin apart. I tried it years ago, for grins and the bullets flew apart shortly after leaving the muzzle. Probably not dangerous, but it could be. Don't waste the time/ammo, 1/7 barrels will spin these rounds apart.

Damn really. That sucks because that is all I have at the moment.  I'll give it to a friend. Those coons got lucky this time

Quoted: Quoted: I have a large stockpile of this ammo which I use for coons and the like. Its extremely accurate and exhibits explosive fragmentation, plus its cheap. The velocity is high and the jacket is thin and shooting it out of a 1/7 barrel will cause the bullet to spin apart. I tried it years ago, for grins and the bullets flew apart shortly after leaving the muzzle. Probably not dangerous, but it could be. Don't waste the time/ammo, 1/7 barrels will spin these rounds apart. Damn really. That sucks because that is all I have at the moment.  I'll give it to a friend. Those coons got lucky this time

What ryno's experience is, may not be yours.  I shot UMC 45 grain and they were fine at 50 yards.  Perfect, round holes.  And it was somewhat accurate.  Sometimes people like to think because it's their way, it's the only way.  Brouhaha, one of the writers of the ammo oracles  has shot several types of 45 grainers in his 1/7 to test and the blitzkings were the only ones he had problems with.  If my memory from an old post of his serves me correctly.  

If it was me,  I'd shoot some to see.  It's not going to hurt and I don't see how youd be wasting time if you're at the range just shoot some.  

very accurate in my 2 20in 1/7's and 16" 1/7...

I think you need to try it.  I shoot it in my 1:8 and it ROCKS.  I read about MANY people who shoot it in their 1:7's with no issues......

shoots super in my colt 1-7 !!!

You are good to go with the 45 gr. JHP out of a 1/7 twist barrel.  The 40 grainers are the ones to really worry about.

They shoot well out of these:
20" 1/9
16" 1/9
20" 1/7
16" 1/7

One thing you have to know is that, because of machining inconsistancies, one barrel might be able to shoot them well, and the next one down the line might not.

Best thing you can do is to buy a box and try it out.

WIZZO