Bushing size help needed

[Pyscodog]

Loading for a 22 PPC and I need to get the correct bushing. A new Norma case is .245. A case with a seated bullet is .247 and a fired case is .250. I have a .247 and a .249 bushing but Redding say to measure a loaded round and deduct .002 and that's the bushing I need which is a .245. Can someone tell me which bushing to use? I'm a little confused and I want to get the correct bushing the first time.

Thanks- Bill

 

[DaveTooley]

I would want a .245 and a .244

 

[dthomas]

I would go with a. 244

 

[Pyscodog]

Thanks

 

[Webster]

Loading for a 22 PPC and I need to get the correct bushing. A new Norma case is .245. A case with a seated bullet is .247 and a fired case is .250. I have a .247 and a .249 bushing but Redding say to measure a loaded round and deduct .002 and that's the bushing I need which is a .245. Can someone tell me which bushing to use? I'm a little confused and I want to get the correct bushing the first time.

Thanks- Bill

I wouldn't buy the expensive carbide bushing. I have been using the steel bushings for over 10 years without a problem. Don't for get to lube the necks. Some guys don't.

 

[Charlie-NY]

I like to use a bushing that is .003" smaller than the loaded round. This allows for some spring-back that occurs as the case neck withdraws from the bushing. You may want to go .004" under if you intend to use a mandrel after sizing.

 

[Pyscodog]

I ordered the steel .244 bushing from Midway. Should be here in a few day. Thanks for the advice!!

 

[mikecr]

Bushing sizing of 5thou or more causes more sizing than stamped on the bushing.
Given this, and your neck clearance, I would try the .246 to see if it gets you back to .245 necks.
See what the .247 does. Might be alright

 

[Pyscodog]

Just tried the .247 and it sized to .247.

 

[TA17rem]

I find my bushings to be exact when I checked them and mine are made by Redding. I have a pretty good assortment of bushing sizes so what I do is seat a bullet into a case and see what bushing slides onto the neck and then just go two sizes down from there. I anneal my brass as well.
I was sizing my 22-250 ackley brass down with standard fl die and then ran them through a bushing die .002 smaller and my groups shrunk quite a bit and loads more consistent, and I annealed brass as well, so both are a big plus in my book.

 

[DShortt]

Just tried the .247 and it sized to .247.

I'd refer to post #2.

Dave is definitely worth listening to.

 

[4xforfun]

It doesn't matter what size the FIRED case is. If your loaded round is .247, I would buy .245, .244, and .243. and TEST.

Now, something nobody talks about, but is a thing, is the thickness of the brass. If you have a round with thick walls, like my 6.5 WSSM, .002 squeeze is plenty. If you have a tight neck and your brass is turned way down...like sub .0010 thick, you may need way more squeeze. My 300 WBY tubes with a .330 chamber that measured .3285 loaded all shot best with a .322 bushing. I tested from .320 TO .327.

Just my .05