REDDING TYPE S COMPETITION DIES, 308 WINCHESTER

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Does anyone have experience with these dies in this cal. i need a starting point for neck bushings. Have a 1969 savage 110 action that's been accurized by savage shooters if thats any help.

thanks

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[Tim K]

Brass thickness is the issue. I use .336 with Lapua brass. Measure a loaded round and subtract 0.002".

 

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THANKS TIM. I'M USING LAPUA BRASS ALSO. DO YOU FIREFORM?

 

[Tim K]

I measure a fired case to the shoulder using a case comparator and then bump it back 0.002" to 0.003". I tried bumping less and even just neck sizing, but found I like the assurance that the round was going to chamber no matter what out in the field.

Accuracy does not appear to change for me from the initial firing to any subsequent firings where the case has been fire formed. That held true for me even when just neck sizing. To be fair, my .308 with a crappy factory Remington barrel had an oversized chamber in the neck diameter and the distance to the lands. It was probably not an appropriate barrel to test those things.

That barrel has been switched to a Lilja in .260 chambered with a fairly tight reamer. I still full length size every time and it delivers 1/4 MOA pretty consistently.

 

[deadshot2]

I measure a fired case to the shoulder using a case comparator and then bump it back 0.002" to 0.003". I tried bumping less and even just neck sizing, but found I like the assurance that the round was going to chamber no matter what out in the field.

Accuracy does not appear to change for me from the initial firing to any subsequent firings where the case has been fire formed. That held true for me even when just neck sizing. To be fair, my .308 with a crappy factory Remington barrel had an oversized chamber in the neck diameter and the distance to the lands. It was probably not an appropriate barrel to test those things.

That barrel has been switched to a Lilja in .260 chambered with a fairly tight reamer. I still full length size every time and it delivers 1/4 MOA pretty consistently.

You're actually talking about two different scenarios and each is different. If shooting a rifle with a "generous" factory chamber, fire forming and then minimal sizing is beneficial for case life. Also offers more capacity and what used to be a compressed charge is no longer a "crunchie" with some powders.

If you have a custom chamber, with minimal extra space, full length sizing doesn't end up working the brass near as much as when shooting in what you called a "crappy factory Remington barrel".

FWIW, I have one of those crappy barrels on my 5-R Milspec and 1/4 MOA is very consistent. I only neck size while bumping the shoulder back .002". I use a Forster Shoulder Bump/Neck Size Bushing die and have had ZERO chambering problems. This die doesn't just push back the shoulder, it also "sizes the OD of the shoulder where it joins the case.

 

[Tim K]

You're actually talking about two different scenarios and each is different.

Obviously. The point I was making is that I did not see any improvement in accuracy after fire forming. I saw the same accuracy on the first firing and on subsequent firings after only neck sizing.