Originally Posted By: coyotejunkieHello all I'm new to the forum and this may of already been brought up but I was kicking around the idea of building one for hunting song dogs I have and really enjoy shooting my 284 win and thought a 22-284 might be fun
The 22-284 is a 22-'06, and the barrel life will be amazingly short.
Even the 6mm-284, or 6mm-06 is rough on barrels. In order to make it work, you need a fast twist, 8" or faster, and bullets for these twists can be hard to get to expand.
The 224 Clarke had a total barrel life of ~600 rounds, and it's a smaller case.
Here are the problems and things to look at.
To be worth while, you have to shoot 75 to 90 grain bullets - the 75 A-Max is probably the lightest you can use and still be getting the benefit of the case volume - and the bullet might not be able to take that spin rate.
If you wan to whack them way out there, you need a very good load - at least a 1/2 moa rifle/load combination. You might need to test a few bullets and powders to find that load, and with less than 600 rounds of barrel life to start, that doesn't leave much left for field shooting.
I'm not saying "Don't do it", just that there is more to it than just necking down.
.