Bushing Neck Sizers

[thespecialist]

I've finally decided to break down and invest in a bushing type neck sizing die for my 308. I've been using a run of the mill RCBS NS die, but would like a little more control over the neck tension.

I use Winchester brass, loaded with 168 AMax's which gives me a loaded neck diameter of .333"-.334". Fired neck dimensions are .343" to .344"

I've decided on the Forster Precision Plus Bushing Bump die, this way I can set the shoulders back .001" along with getting my desired neck tension.

Now, where my newbie-ness kicks in on these dies, a couple quick questions.

What size bushings am I going to need for this die? The bushings are a little pricey, but I don't mind ordering 3 to make sure I have my bases covered. Would I be safe with a a .332 and .331" to get .001"-.002" neck tension?

Am I going to be able to size the necks down from their fired dimensions in one step, or should I order a .338" bushing and size it down in two steps to avoid over working the necks?

 

[MALLARD]

Re: Bushing Neck Sizers

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: thespecialist</div><div class="ubbcode-body">

What size bushings am I going to need for this die? The bushings are a little pricey, but I don't mind ordering 3 to make sure I have my bases covered. Would I be safe with a a .332 and .331" to get .001"-.002" neck tension?

Am I going to be able to size the necks down from their fired dimensions in one step, or should I order a .338" bushing and size it down in two steps to avoid over working the necks? </div></div>

i dont use a forster sizer , so i dont know , but, if if your happy with .332 tension ( if your getting .010 expansion around .332 sounds good for a factory chamber , but im not sure) i would get whatever bushing had an ID of .333

im not sure i reccomend buying three bushings at once , since your not sure what you need.

i wouldnt mess around with .001 increments , i would do .002 , something like .332 , .334 .336 if those are the diameters your looking for.

.001 is madness