Redding die bushing sizes

[Darklyte27]

So im looking at more die bushings, Randall said -.003
while the redding site shows -.001
the dies also say - .001

the bushing chart shown here http://www.redding-reloading.com/pag...angechart.html

shows 308 WIN .335-.343

well when i measured my brass .336 i subtracted .003 and got a .333 bushing.

Is a slightly tighter fit for the bullet more accurate?

[Ahhnother8]

Winchester brass: .333 for first 5+- loadings / .332 after that

1-3 thousandths neck tension is plenty.

Call Sinclair International, they are shooters and know their stuff. They will sell you what you need, not what makes them the most money.

Lane

[rksimple]

I go .002 under. Just personal preference.

[Darklyte27]

so .003 randall was saying is just preference, is it good to have 1 or 2 on both sides of the spectrum? lets say my loaded rd says .336 I should have .335 .334 .333? Should I ever get .337?
thanks for your input.

[rksimple]

You need different bushings depending on the brass you're using. .002 is the most I'd go in a bolt gun. Thats just me. In an auto, .003. Get a .002 and .003 under bushing for the given brass. After 4 or 5 firings, you lose a little springback and may need the tighter bushing.

[phish]

If you plan on sticking with a particular brand of brass, +/- 3 mils should do it, but it's always good to do spot checks whenever you get a new batch of brass.

I know not everyone has access to pin gauges, but if you do, it's a good tool to find out how much constriction you're getting with a particular bushing.

fyi, a .337 bushing gives me 2 mils of neck tension on my particular batch of Lapua cases, but I need a .330 to give me that same amount with Remington UBR, so cases do run the gamut of thicknesses

[huckberry668]

Is a slightly tighter fit for the bullet more accurate?

Nope, I found out the hard way. I use Lee Collect Neck sizing die and I bought another -.002 mandrel from them cuz I wanna to see if it improves accuracy. well, aside from bullets getting cut on the mouth or scratch up easier, it does nothing to improve anything. Usually 0.002" under will do just fine for bolt guns.

[Fjold]

The case is going to spring back .001" or so after sizing. The chamber in my 6.5x284 is cut to .296" and I use a .290" bushing which sizes my necks to .291". My loaded ammo mics right at .2935" so it gives me .0025" of neck tension.

[J-cat]

I'd get a Lee collet die, but if you wanna do bushings, get a .001" and then a .002" under. Use the .001" until the necks get so hard that you need .002" due to increased springback.