No @BRADS, my mrs isn't walking past your tractor.
What is a good set up to get? Brand, good price etc? I don't even know what bits I need. 7RM and 308
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No @BRADS, my mrs isn't walking past your tractor.
What is a good set up to get? Brand, good price etc? I don't even know what bits I need. 7RM and 308
Sinclair int gear is perfect
They have a stunningly good website
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You must be so bored to consider Neck Turning mate.
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K&M - they have an option for carbide cutter on the mandrel, so you get rid of neck doughnuts easily.
Whatever you get, get an adapter for power drill. Doing this by hand sucks !
K&M +1
youll need expander mandrels for each calibre, plus the actual tool, and mandrels for the calibre to fit into the tool, and as ebf says the power drill adapter
Just buy direct from K&M, alternatively Julian @ Workshop Innovation.
Good overview of the process here, I just use some light machine oil with an earbud to lube before cutting.
https://m.youtube.com/watch?v=EyJ9KkE2pVc
k&m recommend the imperial sizing wax, Julian probably is only a like, 10% more expensive
Ah Ha!! Mate has one, just need mandrel and expander in 7mm.
And an actual reason to do it, whats your neck clearance in the chamber now ?
To find out Add 1.3 thou to the OD of a fired neck due to spring back of the brass, 1 thou if its annealed, subtract that from the OD of a loaded neck to get your neck clearance in the chamber.
Hunting rifle brass can have 2 to 10 thou clearance without too much bother, target brass can go tighter at 1.5 to 2 thou clearance.
Remember at 2 thou clearance thats only one thou all the way around.
Be very careful neck turning/removing material from the OD of brass as the amount you remove will reduce neck tension by the same amount with standard dies that often only have 4 thou neck tension to begin with.
bushing dies can overcome the effect by going to smaller bushings.
You can create a big inaccurate mess if not fully understood first or necessary
You are always better off to just go shoot stuff
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He neck turned far too much, not paying enough attention to a lil silver barrel and white face poking out from behind a manuka bush
:)
@Gibo just want to ask why you wish to neck turn? Don't get me wrong, I am well into neck turning, but don't see such a need for hunting reloading. The brass I do neck turn however is all then sized using bushing dies to give correct neck tension. I am shooting tight neck chambers so turning is required to a degree. If using standard dies you can end up with not optimum neck tension or even worse if you turn too much off you end up in no mans land with std dies - unable to size down enough for the expander ball to do its job. BTW I use K&M. Upgraded recently to a carbide cutter and the difference in cutting and finish is amazing. I use the lightest viscosity cutting lube oil available. Wax can give inconsistent neck thickness results 1/4 up to 1/2 thou variations. I originally bought some K&M stuff off Sinclair but hardly use them now for anything - they are shipping rip off merchants. Ended up buying the bulk of what I have direct from K&M. For additional bits I now buy from Julian, if in a hurry or BRT in Oz for cheaper price but slightly longer delivery. There are slightly superior turning devices available eg little pumpkin but they are a lot more expensive than K&M. The only negative with K&M is the cutter angle is a standard dimension and doesn't cut exactly as I wish on my AI stuff.
He wants to neck turn because he has nothing else to do. His cook mows the lawns while he is drinking beer.
Neck turning is only complimented by annealing Gibo.
You are slowly going to be dragged deeper and deeper into the pit. 😆
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I don't really think its relevant as to why or why you shouldn't, if you want to, then do it.. but just make sure you understand the benefits/downsides so it doesn't end up in a bad experience :)
Party pooper
If you are going to neck turn for standard chamber in a hunting rifle, just clean out the outside of your brass. Even if there are a few small spots left unturned on the neck that does not matter too much. As said precedently, you will be better off with Redding neck bushing dies if possible. K&M is how I rock n roll as well.
What do you consider a tight neck please ? A chamber 0.002" over the loaded brass neck OD?
And how many thou larger in diameter would a reamer need to be across the neck for you to consider it as producing a "no- turn" chamber? I'd appreciate opinions on this as looking at reamer dimensions for the next project at the moment with a view to avoiding neck turning if possible.
If you end up with Forster gear then be prepared to find the mandrels are quite undersized. They advertise 0.002 - 0.0025" under but I have a 7mm mandrel here that measures 0.2805". The issue is that the brass needs to necked down to be a tight fit on the mandrel prior to turning. I don't reckon Forster have got this quite right because this level of undersize may be smaller than most unmodified expander balls will produce. Turning on a loose fit will likely degrade concentricity rather than improved it. The same for using bushing dies for this step where a bushing size may need to be purchased specifically to take the necks down to be a snug fit on the mandrel.
Puffin, I understand your concern.
Here is how I see it to answer your question:
Either you are shooting super accurate rifle with tight custom chamber, on bench rest ,and then going with something else than top quality brass like lapua is a false economy. That lapua brass will be already very good in neck concentricity, thickness and tension. So the neck turning you will do on it will just make it perfect. And the small irregularities will deseapear after the neck turning.
Or you are shooting a hunting rifle ( custom or not) but with a standard chamber : if you buy good quality brass for it then you do not need to neck turn, or you have a more average brass and then you could see an improvement and a justification for turning that brass to make it more consistent.
I turn my brass for my bench rest rig (30 BR), used to for my 6.5 creedmoor when I was necking down from 308 brass, now good factory brass is available from Norma.And I necked turn a small batch of 300 whisper and 308 for my subsonic reloading, and see better consistency on target.
@Gibo If you want to have sleepless nights over reloading & really fall into the dark side, buy a concentricity gauge :D
My concern is not foremost about accuracy but about safety around tight necks.
I'm currently looking around at the available reamers for 6.5x47. The reamers where I know the manufacturer are all PTG and there appear to be 2 different profiles, one with a tighter neck (0.292" ) and the other wider (0.2945). Loaded rounds using Lapua brass are 0.290 across. I think you would need to be very careful with just 0.001" all-around clearance. For me the narrower chamber would dictate skimming the necks to take a loaded round down to 0.289" minimum, but I'm interested to see what others think is a safe neck clearance margin. I think most would accept the wider reamer as "no turn" for brass that gave a 0.290" neck for a loaded round.
Whats the best way to measure neck tension?
If you go to the Orient, I can recommend a few places to relieve it😆
Can't really measure the tension per say but you measure a outside Dia at the neck of a loaded round and size your necks from there using the required bushings.
My chamber has a neck Dia cut of .296
I use a .292 bushing to achieve the best results in my setup if that makes sense. Doesn't matter imo how tight or loose you go as long as it is consistent.
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You can keep the side valves bro :D
Outside diametre sounds pointless if the wall thickness isn't the same? Wouldnt inside diametre be better? I dont know what im talking about incase you hadnt noticed ;)
You are right but unless you buy an internal reamer you have no way of controlling that. I ream all my necks but don't turn the outsides. Bushing takes care of that in my case.
You are supposed to measure the outside Dia of loaded round and select a bushing .002 under that to give optimum tension.
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And some times when you've turned your necks got the right bushing annealed ya brass checked with a million different gadgets but are in a hurry to go hunting.........I can still fuck it up.
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Annealed finger? Or was that from the aisian tension relief? :D