6PPC to turn or not to turn?
- Thread starter Link
- Start date
Bronsin
Silver $$ Contributor
My barrels are all .262, so I had no choice but to neck turn, but I'm considering having the necks reamed larger. I'm still going to skim them so there's not going to be an actual "no turn" for me, but hogging all that brass off in 2 steps and making them so thin that they get ruined if you look at them crosseyed is something I'm ready to get away from.
When I bought all of Tony's stuff he started out using a .263 chamber and later on he went to a .268 chamber. I asked him if there was a difference between the 2 and he said not on paper but he turned his brass to 9 to 9.2 for the .263 and 11.4 to 11.5 for the .268. All he said is that he didn't have to turn as much brass off the necks which is pretty obvious.
Link
Silver $$ Contributor
Haven't chambered the new barrel yet. Yet to be determent on input. . Leaning on .272 or .271?
Larry Koch
Silver $$ Contributor
If you have a choice I would go for the .272 nk, I think you might have to still clean up the neck, but it will be easy peasy. Bartsbullets would no.
talk to bart about specs for no turn.. he shoots some that way, but i assume you still need a specific dia neck not a sammi spec
BoydAllen
Gold $$ Contributor
Bart Sauter recently won the thee gun at the group nationals shooting a 6PPC no turn with a .273 chamber neck diameter. He shot his 600 yard HG group record with a 6BRA no turn with a .272 neck dia. chamber. If he thought that turning would give him any advantage, I doubt that he would have used those chambers for competition, much less the group nationals.
To be fair however (and correct me if I misunderstood, I’m extrapolating from multiple posts i’ve read ), Bart starts with no turn cases, and culls cases that throw fliers (regardless of cause). This leaves him with a set of known good cases to use in competition but “without neck turning”.
Time and effort spent in different ways, but you can’t argue with the results - on target testing by definition eliminates case variations that matter (might even be related to the neck thickness, who knows!)
I replied to Link in a PM. I just getting back from a 600 yard match. Couple of things to consider. The new blue box Lapua is thicker than it use to be. So I’d go with a .274. When you do something different there are growing pains. I figured out pretty quickly that my bullet seater and FL die had to be opened up to accept the new brass.
Bart
Bart
Link
Silver $$ Contributor
xr650rRider
Silver $$ Contributor
Manson's off the shelf no turn neck reamer has a .276" neck. I measured new Lapua blue box virgin 220 Russian brass with a 68 grain Fowler FB bullet at .273", so the .276" makes perfect sense. I did have to open up the necks on the Harrels die and Wilson seater dies both were right around .268", I opened them to .274" with a carbide boring bar in lathe.
Might also be called a no trim as well. After fire forming longest case is 1.500", so they have room to grow to 1.525".
Might also be called a no trim as well. After fire forming longest case is 1.500", so they have room to grow to 1.525".
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jackieschmidt
Gold $$ Contributor
I have been shooting a .269 for years. The reason is for ease in turning necks.
With the new brass, I would go with a .271 if you still want to turn, if not, a .274.
If I ever get a new reamer, it will be a .274 for no neck turn.
With the new brass, I would go with a .271 if you still want to turn, if not, a .274.
If I ever get a new reamer, it will be a .274 for no neck turn.
BoydAllen
Gold $$ Contributor
Jack Neary has said that he gets better accuracy from trimming often. He ordered a 6PPC reamer with a max. case length the same as this print, with the thought of not having to trim, and then discovered that trimming often improved his accuracy. Going another way, years back, Tony Boyer tried a reamer with a max case length of 1.500, fire forming in one that allowed for longer brass and then trimming to a closer fit than would be possible, with the common maximum of 1.515". Some time after I read about that in Precision Shooting, I asked him if he gained anything from that, and he told me that he didn't. Early in my reloading, and for some time, I thought that keeping the end of case to end of chamber gap small was desirable for best accuracy. Turns out I was wrong. What we have learned in the last few years is that a closer fit is not always best, whether it be neck clearance in a tight neck chamber, loaded round body in chamber, clearance at the .200 line of an unfired case, or bullet in freebore.
Tim Singleton
Gold $$ Contributor
I like the .442 at the 200
xr650rRider
Silver $$ Contributor
These are actual measurements and anything below .276" is a little tight for me for true no-turn, now if you want to clean up necks, then a .274" might be about right.
Blue box Lapua once fired. 68 Fowler FB
68 Bart's Ultra FB
Blue box Lapua once fired. 68 Fowler FB
68 Bart's Ultra FB
The lot I'm working with is right at .272 loaded iirc. Perhaps it's varying more from lot to lot. My old stuff was definitely thinner but I don't remember exact numbers. If I get time, I'll check a couple tomorrow
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