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.200" Leade: Any problem here?

 
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  #8  
Old 08-19-2009, 09:15 AM
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Re: .200" Leade: Any problem here?

One of the posters in the 2005 threads said to never increase the OAL (to the ogive) lengths without reducing the powder charges. It makes sense, but the Hornady and Sierra manuals never mention anything about their suggested powder charge figures as compared to where the bullet is seated. In other words, different bullet seating depths will affect their published suggested powder charges. It only makes sense. I will call Sierra or Hornady to find out if their suggested powder weights are based on a huge freebore ("leade") or what.
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  #9  
Old 08-19-2009, 10:00 AM
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Re: .200" Leade: Any problem here?

Here's the scoop. I called Hornady with a few questions. Regarding case length, they said to make sure the cases are never over the maximum SAAMI published length (listed in the Hornady loading manual), but that if the cases are shorter than the maximum, to trim to the length of the shortest case in the batch, as long that trim length is no shorter than the one listed in the manual. For the .270, the shortest trim length is .010" less than the maximum length. In the current batch I am trimming, that means that I will trim all the cases to 2.535"...the length of the shortest case in the batch, and about midway between the max and minimum lengths in the Hornady manual.

As for the question of freebore vs. their suggested published powder charge data, they said that their data is based upon the maximum cartridge OAL, (listed in the manual as C.O.L.) as measured from the base of the cartridge to the tip of the bullet, not from base to ogive. The reason given as to why not the ogive was that the OAL in this case is because of different magazine lengths in different rifles. The C.O.L. lengths are listed below each of the pictured bullets. So...this answers the question of freebore vs. pressures. I.e., their powder charges are based upon their C.O.L. figures. Whether or not this method is better for the smaller centerfire calibers used in small varmint hunting and/or BR reloading, I don't know. I load fairly close to the lands for those rifles. But as for the .270 I think I will reload, taking into consideration that bullet seating with a much longer freebore is recommended and not to be a problem.

At this stage, I will start with the figures recommended by Hornady, reload three cartridges at .030", three at .040" and three at .050", then check for accuracy and signs of pressure overload.
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Old 08-19-2009, 08:28 PM
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Re: .200" Leade: Any problem here?

" 40x Remingtons) with blueprinted actions, BR barrels, triggers, and all the other stuff for maximum accuracy. The .222 is an original Remington Custom Shop 40X that is a joy to shoot."

Goofy, mine is in 6mm International. It's still all original, with the 2 oz trigger, and wears an original Remington 24X BR scope, the one that started the "short" (action mounted) target scopes. All 40Xs are/were Custom Shop products.

Mike Walker, who developed the 721/700/40X series of rifles, the .222 and designed the BR scopes is a friend of mine. I got the rifle in the mid 70s, got the scope from Mike just a few years ago. I treasure that rig!

Good luck!
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  #11  
Old 08-19-2009, 09:15 PM
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Re: .200" Leade: Any problem here?

Boomtube, so do I. It is my favorite rifle and is the last one I would sell.....if I had to sell, that is. Easy to reload, accurate, very little recoil. A marvelous BR rifle with the wide fore end. I take it hunting for ground squirrels with deadly effect....for the ground squirrels, that is. The fit and finish....well....I don't know if Remington still makes them the way they made mine. If I come across another one...especially in the shorter barrelled version, I would sure consider buying it. It was a BR classic for years, before the 6BR and the PPC came out.
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