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Neck sizing vs full length

What is the most common practice amongst distance shooters, f-class, prs? Neck sizing only (with a mandrel after) or full sizing?
 
I'm a fan of neck sizing.
But then, i'm not in the top 5% either. Still getting my feet wet on match shooting.

I'm willing to bet you'll probably get most saying full length, and "bumping back" the shoulder.
 
What is the most common practice amongst distance shooters, f-class, prs? Neck sizing only (with a mandrel after) or full sizing?
Most common is FL sizing . Many folks still use neck sizing as part of their routine, they are just not as vocal as the guys trying to look cool denouncing Neck Sizing . A majority of those guys also have no experience with a neck sizer , they just want to fit in.
 
I neck size and use an expanding mandrel I’ve never used a hammer the only time I’ve ever experienced a click upon extraction was when testing near the high end of a load
 
See how the Top Shooters in F-Class do it.
First, someone needs to explain WHY? Why would you give up concentricity in the chamber to brass fit?

Second, has anyone explained to everyone else that the top shooters who "full length" size are doing so with custom dies? And, newer presses that have a better 'float' fit for the brass in the shellholder?

Third, neck sizing works just fine when you're not ramping the loads up past the designed maximum operating pressure of a powder.

Fourth, Mac McMillan neck sized all his match loads. Only one guy in history has ever beaten him.

PRS, yeah I can see FL sizing. Top bench? F-Class? I don't see why. Unless you run your loads as hot as you can and HAVE to FL size so as not to beat the bolt open and closed with a hammer. And, gall your lug faces. But, those are just commodities. Barrels...somebody figured out you burn more money in bullets and powder so just throw a $700-$1000 barrel in there too. Cost of playing the fast game, right?
 
First, someone needs to explain WHY? Why would you give up concentricity in the chamber to brass fit?

Second, has anyone explained to everyone else that the top shooters who "full length" size are doing so with custom dies? And, newer presses that have a better 'float' fit for the brass in the shellholder?

Third, neck sizing works just fine when you're not ramping the loads up past the designed maximum operating pressure of a powder.

Fourth, Mac McMillan neck sized all his match loads. Only one guy in history has ever beaten him.

PRS, yeah I can see FL sizing. Top bench? F-Class? I don't see why. Unless you run your loads as hot as you can and HAVE to FL size so as not to beat the bolt open and closed with a hammer. And, gall your lug faces. But, those are just commodities. Barrels...somebody figured out you burn more money in bullets and powder so just throw a $700-$1000 barrel in there too. Cost of playing the fast game, right?
Well said ,you bring up some valid points and questions .
 
First, someone needs to explain WHY? Why would you give up concentricity in the chamber to brass fit?

Second, has anyone explained to everyone else that the top shooters who "full length" size are doing so with custom dies? And, newer presses that have a better 'float' fit for the brass in the shellholder?

Third, neck sizing works just fine when you're not ramping the loads up past the designed maximum operating pressure of a powder.

Fourth, Mac McMillan neck sized all his match loads. Only one guy in history has ever beaten him.

PRS, yeah I can see FL sizing. Top bench? F-Class? I don't see why. Unless you run your loads as hot as you can and HAVE to FL size so as not to beat the bolt open and closed with a hammer. And, gall your lug faces. But, those are just commodities. Barrels...somebody figured out you burn more money in bullets and powder so just throw a $700-$1000 barrel in there too. Cost of playing the fast game, right?
I’m not a top shooter by any means and your mind is probably made up so don’t flame me ! but I’ll try,
firstly from what I’ve experienced consentricity is down the list of things that affect accuracy at least in my testing.
Second I use a press that is older than my kids but do enjoy semi custom dies over fighting the process.
Thirdly when developing loads I just follow what the target tells me and what the say is hot loads don’t necessarily repeat
Fourthly, who’s McMillan? Maybe the guy that beat him was full length sizing hell I don’t know.
Yeah Barrels cost money but you can win them at events if your willing to FL size.
 
I’m not a top shooter by any means and your mind is probably made up so don’t flame me ! but I’ll try,
firstly from what I’ve experienced consentricity is down the list of things that affect accuracy at least in my testing.
Second I use a press that is older than my kids but do enjoy semi custom dies over fighting the process.
Thirdly when developing loads I just follow what the target tells me and what the say is hot loads don’t necessarily repeat
Fourthly, who’s McMillan? Maybe the guy that beat him was full length sizing hell I don’t know.
Yeah Barrels cost money but you can win them at events if your willing to FL size.
No flaming on the first part.

I would not say concentricity is down the list. Bullet runout, bullet alignment in the case, FWIW, even full length sizers are HUGE on concentricity. My question is then, why go all through all the steps to get concentricity when the finished product is off in the chamber? Concentricity IS one of the top two concerns when reloading for competition.

That leads us to the second point about custom dies. Some of the top shooters dies aren't really FL sizing dies. They are custom made for MINIMAL separation of the case to the chamber. So, they are barely sizing just a smidge more than what a neck sizer would take down. If that. Often the same reamer is used for the die as the chamber it's just pushed in .002" short. That leaves the shoulder getting bumped back .002". And, since there is very little taper on the 6-Dasher and 6-BRA, there is very little sizing on the case walls.

I also understand that brass has an elasticity that steel does not. It also comes back to original shape and size better. Thus why cases can be extracted more easily. It's also why custom dies have to size them less.If you run brass too hot, no matter what way you size, you're going to have sticky bolt lift. Or, blown primers. I watch guys all the time chasin' the unicorn of hotter and hotter loads. Just find an accurate node that is below pressure problems and you will not have hard to move brass.

After reloading some brass as much as 20 rounds reloaded on it I've not had to FL size. I'm not shooting as fast and may have to call wind that tiny bit better, but I consider that knowing your ballistics. Loading hot eats barrels and destroys brass which leads to inconsistency.

I doubt if any of the guys Speedy asked how they size would take a brand new RCBS, Redding, Lee or Lyman 'off-the-shelf' die if he handed it to them so they could use that for their next match. Those are made for the masses. Again, customs are made to fit with very little brass movement.

Now for the flame. You need to find out who Mac McMillan was. Read up, there is a lot of good information. The guy that beat him, Stinnet, as I understand uses a custom die to FL size.


There is a lot more to this than just FL sizing.
 
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“Concentricity IS one of the top two concerns when reloading for competition”

Really? Think I would catalog that statement as opinion rather than fact.
 

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