brian,
Thanks for the reply. I bought a barrel a few months ago that was advertised as a .243 Winchester, it turned out to be a 22/250 with 1-10 twist(soon to be an Ackley). I prefer a slower twist but I thought i'd give it a try.
I talked to Sierra yesterday and he told me it should shoot 55 to 69gr bullets. Any idea how the 69's work on deer?
Thanks,
Stepchild

"lightest bullet this barrel will stabilize"???

Heavyest surely?

Anyway - theres a neat stabilization calculator on the NFA Canada website - Ive check the maths and its spot on, in my not so humble opinion. AND a long way past Greenhills crappy tables - remembering that Grenhill thought that 1600fps was fast!

Derrick,
Up until now all the .22 centerfires I have owned have had 1-14 barrels. If I wanted to shoot anything over 55gr. i'd grab a 6m/m or whatever. Thanks for your reply.
Stepchild

Yah...I think Derrick is right on. The question is not how light a bullet, but how heavy a bullet. I think anything lighter than 69grs as long as they are not VLD's

I have not used this bullet on deer. However, in the short time I have used this bullet in the 22/250 AI, it has only been used on Kangaroos, foxes, feral cats, and rabbits.

I previously used this bullet in my .224 Clark at around 3850 fps, and at this velocity, shots to the chest cavity area would sledge Kangaroos, feral goats, emus, etc to the ground, leaving large exit wounds.

I assumed that the 69 grain Sierra HPBT was fairly thick in the jacket as it held together at these velocities without any sign of coming apart. In the last 3 months I have been asked by several friends, (who had permits to cull excess kangaroos) to perform the cull.

Initially I was worried that the 69 Sierra at the lower velocities from the 22/250AI, would punch through, so I decided to head shoot them. At 3300 - 3400 fps, the bullet still took large chunks of tissue and bone out (including some 6- 7 feet tall greys) and cartwheeling them to the ground.

Last week a friend borrowed the rifle to cull some roos' on his property, and told me it was terrific, as he shot 12 (2 misses) aiming at the chest cavity.

Translating this experience with the 69 grain Sierra on kangaroos to how it would perform on deer is problematical, but I believe that it should do the job. Good luck, Brian

Brian,
It sounds like it passed the test with flying colors. I'm sure deer will not be a problem and i'm sure i'll like the 69's once i've tried them. I've used 55gr. Sierras for 40 years on everything from Prairie dogs to deer and like that bullet very much. I guess it's kind of like the"If it ain't broke, don't fix it thing" with me.
Thanks to all who replied.
Stepchild

Now this is interesting. I am planning to rebarrel a Sako FibreClass 7-08 to 22-250.I had been thinking that a person could go with a faster twist than the usual 12" or 14" and "maybe" try a fling with the 60-70 gr bullets. Has anyone fired,say,50's thru a 10" twist at 3800+ and had them "come apart" in the air?

I experimented with 50 grain Nosler Ballistic Tips in my 223 AI with a Pac-Nor SSSM barrel in 1:8 twist, and got them a bit over 3700 FPS. Pretty accurate, and no evidence of them flying apart. My 220 Swift is being rebarreled with another Pac-Nor 1:8, and I'll be trying the 50's again just for grins. The rifles are intended to shoot mostly 75 grain and up VLDs.

Stepchild2-that is good news-I like that design of bullet. I just built a 22/250 AI, that could be just the ticket for me.

When do you hear that it will be available?

"GET TO THE HILL"

Dogz

Mark,
I got this info from one of Sierras tech. guys and he didn't say exactly when it is coming out. You might check with Sierra for more specifics.
Stepchild

I have a 22-250 with a 1:7 twist. Ususally shoot 75 g. and 80 g. bullets, but 55 g. speer shoot very well too.