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RCBS vs Redding dies

 
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  #8  
Old 06-02-2011, 04:24 PM
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Re: RCBS vs Redding dies

Sierra Bullets gets best results (cartridge straightness and best accuracy) using Redding full bushing or standard Redding full length sizing dies. They agreed with me that the RCBS versions of both dies would perform the same.

Four things:

First, I think you mean Redding's copy of Forster's full length sleeves in their seaters rather than bushings in the sizers. ??

Second, I disagree about the value of the RCBS/Hornady/old Lyman PA dies with short sleeves that ONLY align the bullets and necks since they are not any better fitted than most common dies.

Third, common dies are, on average, pretty good so even the Forster/Redding dies may not make any great difference in concentricity all by themselves.

Four, contrary to poplar opinion, an unskilled reloader won't make good ammo no matter how much his tools cost nor how precisely he measures his powder charges. But a skilled reloader can make good shooting stuff on virtually anything.

Good load development is critical for good performance. A load can be as precisely assembled as a Swiss watch but if it's not matched to the firearm the accuracy will be atrocious!
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  #9  
Old 06-02-2011, 04:26 PM
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Re: RCBS vs Redding dies

Quote:
Originally Posted by Anvil11-87 View Post
I'm looking at getting a competition seater die for my .308 loads. Any opinions on RCBS vs Redding dies??
look for a Forster .308 national match die set. Half the price of a Redding and probably a little better
gary
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  #10  
Old 06-02-2011, 04:28 PM
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Re: RCBS vs Redding dies

Quote:
Originally Posted by flashhole View Post
Forster is a better choice, either their Benchrest or Ultraseat die give excellent concentricity results.

Of the two you mentioned, Redding is the right choice. Same design as the Forster.
the Forster sizing die is different than the other two, which are pretty much the same design. The difference is in the neck sizing sequence. The Forster does it after the case body is completely traped in the die body; not when the sizing cycle is first started.
gary

Last edited by Trickymissfit; 06-02-2011 at 04:37 PM.
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  #11  
Old 06-02-2011, 06:00 PM
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Re: RCBS vs Redding dies

Quote:
Originally Posted by boomtube View Post
Sierra Bullets gets best results (cartridge straightness and best accuracy) using Redding full bushing or standard Redding full length sizing dies. They agreed with me that the RCBS versions of both dies would perform the same.

Four things:
Quote:
First, I think you mean Redding's copy of Forster's full length sleeves in their seaters rather than bushings in the sizers. ??
No, I'm talking about fired case sizing dies. Not about bullet seating dies.
Quote:
Second, I disagree about the value of the RCBS/Hornady/old Lyman PA dies with short sleeves that ONLY align the bullets and necks since they are not any better fitted than most common dies.
My old RCBS standard bullet seating dies put bullets in .308 Win. cases just as straight as my old Wilson chamber type seating die. Those bullets are in virtual perfect alignment with the case neck which happens with all seating dies.
Quote:
Third, common dies are, on average, pretty good so even the Forster/Redding dies may not make any great difference in concentricity all by themselves.
If you're talking about seating dies, that may be true. I've never used a Redding or Forster seater except for a short test that showed they did pretty good.
Quote:
Four(th), contrary to poplar opinion, an unskilled reloader won't make good ammo no matter how much his tools cost nor how precisely he measures his powder charges. But a skilled reloader can make good shooting stuff on virtually anything.
Good point.
Quote:
Good load development is critical for good performance. A load can be as precisely assembled as a Swiss watch but if it's not matched to the firearm the accuracy will be atrocious!
There are a few hundred (thousand?) top ranked long range rifle shooters around the world that disagree with this premise. Best example was when a few of us developed the load for Sierra's first Palma bullet then made several thousand rounds of it on two Dillon 1050 progressives. Metered powder charges with a 3/10ths grain spread, bullet runout up to 3/1000ths in new Winchester cases and Fed. 210M primers. After a few thousand rounds were shot in the first match using them, a few dozen folks from all over said it easily held 1/2 MOA at 600 yards. Their barrels had different chamber, bore and groove dimensions as well as different barrel contours. All on 5 or 6 different actions. Even a good lot of commercial match .308 Win. ammo would shoot inside 4 inches all day long in a variety of M1 and M14 match conditioned service rifles. Arsenal made lots of ammo used in international Palma competition is very accurate in virtually all rifle-barrel combinations.
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  #12  
Old 06-02-2011, 06:44 PM
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Re: RCBS vs Redding dies

"A load can be as precisely assembled as a Swiss watch but if it's not matched to the firearm the accuracy will be atrocious!

"There are a few hundred (thousand?) top ranked long range rifle shooters around the world that disagree with this premise."

Okay, but I think you missed my point. And it seems you did use a well developed load, if by chance or long experience with the cartridge I won't guess. ??

But, change the powder, primer and charge, keep the same good bullet but change the OAL by 20 thou. Then use the same dies, press and methods precisely and see what happens. Just meanimg that no matter how precisely the cartridge is assembled, if it is a bad load all that precision won't make it shoot good!
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  #13  
Old 06-02-2011, 10:28 PM
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Re: RCBS vs Redding dies

Quote:
Originally Posted by boomtube View Post
But, change the powder, primer and charge, keep the same good bullet but change the OAL by 20 thou. Then use the same dies, press and methods precisely and see what happens. Just meanimg that no matter how precisely the cartridge is assembled, if it is a bad load all that precision won't make it shoot good!
Changing all that stuff's exactly what happened after Varget became the powder of choice for .308's shooting the Palma 155-gr. bullet. Charge weights varied from 45 to 47 grains in both my Palma rifles for cases weighing between 150 and 170 grains. Both the very mild RWS 5341 primer as well as Fed. 210M and Rem. 7.5 small rifle primer was used. Depending on how much throat had been eroded away, the three barrels, each with a different contour and length needed a spread of about 20 thousandths in cartridge OAL to have the bullet seat about 5/1000ths deeper in the case when chambered for a constant start-up resistance for each shot. All combinations shot about 5/10ths MOA at 600, 6/10ths at 800 and 7/10ths MOA at 1000.

I'm a firm believer that if everyone shot at least 20 shots per test group, the number of "favorite loads" for a given round would diminish by at least 80%. There's not a very high probability that a 5-shot group represents what all shots fired will produce; not over 50%. 20 shot groups have about 80% chance of being what all will do. And four 5-shot group atop one another are bigger than any one of the individual 5-shot ones. Most folks don't shoot enough shots per group to make a meaningful decision about it's accuracy. Which is why I'm not really impressed by 5- or 10-shot benchrest records; they're more luck than human and hardware performance because they represent only a very small percentage of all groups fired. I prefer to look at aggregate averages then add 20% to that; the result is much closer to what one can expect accuracy wise all the time.
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  #14  
Old 06-03-2011, 06:50 AM
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Re: RCBS vs Redding dies

I'm a firm believer that if everyone shot at least 20 shots per test group, the number of "favorite loads" for a given round would diminish by at least 80%. There's not a very high probability that a 5-shot group represents what all shots fired will produce;

VERY true, unless that five shot group is LARGE! I have to laff at those who obviously got - maybe - a .3" three or four or five shot group from their factory sporting rifle in a hunting caliber saying he can get .25" all day!

A group of twenty shots is reasonably relivant, but a tiny group of three or four or five shots is more likely a statistical fluke meaning nothing at all. Averaging a series of five shot group sizes also means nothing except in BR competition, only groups that include ALL of our hits has any real world significance!

So far as 'favorite loads' goes, I rarely even read those threads but it's always amusing when I do; some poor soul wants a short-cut and asks "What's your favorite good shootin' loads." If he gets thirty responses no two will be the same so he still hasn't a clue what may work in HIS rifle without experimentation and load work-up. I believe he would be better helped just by directing him to his loading manual and saying "go for it."

Last edited by boomtube; 06-03-2011 at 06:59 AM.
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