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Bench Rest Shooters
bambambam
Member Posts: 4,814 ✭✭✭
I'm guessing most of you neck turn your cases as part of your case prep.
I bought an RCBS neck turner to go on my Case Trimmer II. I played with it tonight on some scrap brass.
Do any of you have a method to get the cutting anvil set? I couldn't get it adjusted very easy with out cutting air or taking hunks out.
I was thinking maybe a fealer gauge may work?
One other thing...I'm shooting a 1974 Remington ADL 700 in 7mm Rem Mag all factory. My reloading supplier said I was pissing into the wind trying to neck turn cases, then shoot them out of a factory gun. Am I gaining anything here?
I bought an RCBS neck turner to go on my Case Trimmer II. I played with it tonight on some scrap brass.
Do any of you have a method to get the cutting anvil set? I couldn't get it adjusted very easy with out cutting air or taking hunks out.
I was thinking maybe a fealer gauge may work?
One other thing...I'm shooting a 1974 Remington ADL 700 in 7mm Rem Mag all factory. My reloading supplier said I was pissing into the wind trying to neck turn cases, then shoot them out of a factory gun. Am I gaining anything here?
Comments
The feeler gauge is exactly the thing to use. This is a very finely adjusted tool without the 'very fine adjustability' built in.
I think that most will agree that on the surface we might think that this could be a waste of time on your part, especially considering the quality of Remington's chambers.
However, the act of minimally turning the case neck makes the neck thickness consistent in thickness and when coupled with a proper bushing die and bushing, allows the shooter to get the best, consistent bullet release from that brass case.
Is it going to make your rifle super accurate? Nope. But it might show some small improvement over the chronograph with the velocities and ES being slightly more consistent.
Be aware that your brass resizing will change a little bit also, that's why I suggest a bushing die for more control.
Best.
Back when case necks were very uneven, neck turning was almost mandatory for increased accuracy. Today, most brands of brass are very good right out of the box. Turning necks for a factory chamber may actually make accuracy worse since it only makes a sloppy fit even sloppier. Having a case neck wall uniform within a small fraction of a thousandth of an inch doesn't mean much when there is a .020" gap between the neck and the chamber.
The 7mm pilot is a reamer and arbor for the cutter.
Auto Feed is guided by the VERY fine threaded coupler on the right, as you turn the handle it feeds at the rate of the thread. When you get to the neck you lift the guide finger off the threads and pull the shaft back.
after marking that section of the neck, set the trimmer/cutter to THAT point of the neck and then turn the necks accordingly
or use a piece of old brass, and continually set the cutter VERY LITTLE at a time, until you get the correct thickness
select the correct size bushing for your dies, and get started sizing the turned cases
not really rocket science, but pays dividends in tight neck/match spec chambers.
I'm curious because none of my stuff has anything like that.
That is for my 6.5x55imp die set. say I have a (6.5mm) .264" bullet, and a case with it's neck turned to .015", that would yield a seated round of .294" (.264" + .015" + .015"). The .292" bushing would, therefore, give .002" neck tension.