I'm going to have my smith recut the barrel threads, to "correct" the overlength throat in the bore and then punch it out to .223 Ackley Imp.
As it sits, the throat is so long that I need 69 gr. Sierra Match Kings seated way out in brass trimmed 0.100" over length to even get close to the rifling. I'm hoping to be able to get 40 gr. Nosler Ballistic Tips to kiss the lands in an Ackley Imp. chamber.
Yeah, it's worth the work to shoot Ackley. I match load this brass anyway, trim, weigh, deburr, neck polish . . .
Without a "tight neck" do I gain anything by neck turning? Makes the neck more concentric and the release more uniform, but will it be worth the effort in a std. chamber? Or do I need a "tight neck" bbl.???
For a standard neck chamber their is probably little to be gained in accuracy by turning necks even if you are Varmint Al(I think he is Probably shooting tight neck chambers).Their is theoretic benefit in neck turning for concentricity etc but I have never seen significant gains in standard chambers.
------------------ Growler
Posts: 95 | Location: Alberta Canada | Registered: 23 March 2001
Factory barrel?? If so toss it. Get a good one. Your looking at something like 150 bucks to set it back. Think hard about getting a Pac Nor long chambered barrel. You will be money ahead and have a much better piece of gear.
Posts: 813 | Location: Left Coast | Registered: 02 November 2000
Varmint Al says 50% increase in accuracy from neck trimming for standard bbl. Eliminates the wild flyers, AND cuts back on neck splitting from unconcentric case necks.
Rem is a good bbl. I may install a Lija (sp) or Shilen -- mostly depending on what the set-back sets me back.
I would surely look at a new barrel. I can't agree that Rem barrels are all that good. I have had two 700's in the last few years that had very poor barrels. One that needed to be replaced totally and the other that I had rechambered as the factory chamber was so out of round. Even a cheap Douglas or E R Shaw would probably shoot better than the standard Remington barrel will. Your spending money anyway to get it rechambered, might as well get a new barrel. My opinion anyway.
FN
Posts: 950 | Location: Cascade, Montana USA | Registered: 11 June 2000
quote:Originally posted by scot: Factory barrel?? If so toss it. Get a good one.
Normally, I'd agree, or even be the one recommending this. However, just two days ago, I shot a .080" (yep, that's correct) group with my PSS in 223 and factory barrel. Granted, it may have been a fluke, but this rifle routinely shoots in the .3's and sometimes the .2's (5 shot groups). I dread the day that this factory barrel needs replaced.
Ghengis, an alternative to neck turning is sorting your cases by neck variance using a tool by www.sinclair intl.com This will help if you go with a std neck dia. in your chamber. Darrell can attest to its merits. sure-shot
Sinclair make a lot of very nice gauges and tools. One gauge is intended to determine how long a chamber actually is. This gauge and the RCBS case mic used on a fire formed case will give you a lot of information on your chamber dimensions. It is amazing the extent of tolerance allowances in rifle chambers. If the rifle indicates that it might be a shooter, there is a cheaper and easier way to correct your problem. Cases for the .222Rem Mag is larger that the .223 Rem. By using the Sinclair gauge and the RCBS mic you can adjust your full length sizing die to size .222RM cases to a headspace dimension .001" less than the headspace length measured on the fire formed case and trim to a length .002" shorter than indicated by the Sinclair gauge, then fire form. Use a fire formed case to adjust a neck turner to turn to the shoulder, but no deeper. Then when your converted .222RM are fire formed, your ready to turn them. Be sure to clean inside the necks with a bore brush before turning. This will give you enough neck to reach the rifling and will give you custom cases. This is why the headstamp on my .22-250s say .243 Win. My 7mm-08s say .30-06. It's a lot of work, but well worth the results. When turning the necks, remember, remove only enough metal to make the neck thickness consistent throughout the neck. I hope that this will be of some help. If you decide to go this way, and I can help, e-mail me. If help is not needed, e-mail me and let me know the results.
