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  #1  
Old 04-13-2010, 10:34 PM
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Hello to All,
I have a question, and i don't even know how to look it up, so please be kind in your responses. I know nothing about wildcats, and have only reloaded with the help of an expierienced friend. On than note, I also don't plan on taking on this by myself, at first at least, but I do need a baseline. What i have is an '09 700 CDL Boone & Crockett in .300 winmag. I like the round, but I dont like the fact that is belted. The rifle has a fluted BLUED bbl, which I don't see often, with custom engraving, unique to the B&C. What I would like to do is use that bbl and another case. I dont expect to just swap in the other brass, but i dont know what is involved in changing calibres. I would expect changing the action, but what else, and what recommendations, if possible at all. I hunt everything from pronghorn to (God willing i should draw a tag) bison, if that is a consideration(and i realize winmag is too big for antelope, so I am getting a .270 later). Thank you guys for taking the time to read this, I look foreward to hearing your thoughts.
-Ryan
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  #2  
Old 04-13-2010, 11:13 PM
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I stumbled onto another post about winmag vs wsm, and it got me thinking, would it be possible to cut down a wby case, set the tooling to winmag, and just use that?
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  #3  
Old 04-14-2010, 04:58 AM
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Ryan,

If you have not already been welcomed, let me be the first. Welcome to ShootersForum! Rules are simple, be nice and join in.

The problem you're going to face when trying to rechamber your existing barrel to a non-belted round, is that you'll have to increase the diameter of the chamber, such that the entire length is the nearly the same size as, or larger than, the belted portion of your 300WM case. At the same time, you will need to maintain, or increase, the overall length. All of this pertains regardless of whether you want to retain the original 308 bore, or have it cut to something larger. The only cartridges that jump to mind are the Remington Ultra Mag line. You would need to check with a gunsmith, but it looks like you could possibly bore out the chamber to accommodate that larger case.

You might need a different bolt face (or open it up just slightly) and will almost certainly need to rework the magazine area, to get it to feed well, but I think what you're wanting to do is, in fact, possible. Now, I will also go on record as saying it is entirely unnecessary, as there isn't a thing in the world "wrong" with that 300WM belted case! I know the current trend is toward belt-less rounds, but neither design is inherently stronger or superior...they just use different means to establish headspace. If you want more power and recoil from your existing gun, a 300RUM would achieve that, but there is no problem whatsoever with what you already have and therefore, no need to "fix" it.

Also, keep in mind that modifying your gun in such a way is likely to reduce its resale value, as it will no longer be original, and it will probably limit potential buyers, if you ever do choose to sell it. Not everyone wants the power of a 300RUM.
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  #4  
Old 04-14-2010, 06:23 AM
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88,
A .300 Winchester Mag is not too big for Antelope or anything
else for that matter. You can only kill an animal dead. I have been
Antelope hunting many times and have seen quite a few guys using
big magnums on them. Just choose a bullet that won't explode and
you are good to go. For example a Nosler Partition. Just make sure
there isn't another Antelope standing behind the one you are shooting
at.
Zeke
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  #5  
Old 04-14-2010, 07:38 AM
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If you're just wanting to get rid of the belt, ask your gunsmith about rechambering to the .300 Dakota. That's a cartridge based on a .404 Jeffery case, necked down and shortened to about the same length of the .300 WM. The case body is as large as the belt on the WM, so rechambering shouldn't involve all that much.

Down side is the cost of priority brass.
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  #6  
Old 04-14-2010, 11:57 AM
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Thank you guys for the quick reply. I am actually leaving for Afghanistan in the next month, so if I am going to have work done, I want it done while im gone, and won't have much time for research after i leave. So, again, I thank you. Now, my next stupid question, is why does the new case have to be as large as the belt? I'm not tring to argue, I just want to understand the physics of what I want to do. Would my current action actually work with the legnth of the rum? The dakota appears to be a sweet round, but im wondering how hard it would be to get my hands on a lot of brass. still a thought, though. I am not worried about resale, I don't buy anything I plan on selling later. What I have I buy for me to enjoy, lol, or I get something else. Thank you for the kudos on the B&C, I love it as well, I just want reliable brass. the only other B&C's I found was a .270, which is one of my favorite rounds, but a little light for my taste on elk and larger, and a short mag, which I have heard to many people talk about poor accuracy, and i went with the round i was familiar with shooting and best suited for the big stuff. I am now collecting firearms, and want to do all my own reloading in the future, hence my desire for a solid case. Thanks again!
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  #7  
Old 04-14-2010, 01:08 PM
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If wanting to save the present barrel, you will have to rechamber to something that will have a case diameter slightly larger than the .300 WM to completely cut the old chamber out of the barrel. As the .300 Dakota's base size is almost exactly the same size the the belt diameter on the .300 WM (.545" compared to .532"), it is a pretty straightforward process to ream the present chamber for the new cartridge. The 'smith doing the reaming work will normally set the barrel back one thread or so to assure the best reaming result.

As far as brass, it is obtainable from several sources (Google for such). Last I bought for the 7mm Dakota ran about $1.25 per case. Guess some of the newer whizbangs from the rifle mfg'rs will run the same of more, so maybe it isn't as expensive as thought. To me, it seemed like a big deal! However, no more than I shoot the rifle (a customized tang safety Ruger M77) the 100 or so neck sized brass will last me a lifetime.
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  #8  
Old 04-14-2010, 04:10 PM
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What is the problem with the belt if you are otherwise happy with the rifle and performance? You do not have to use the belt for headspace. I have three belted magnums but never use the belt for setting headspace but rather use the shoulder. All you have to do is adjust the sizing die for headspacing on the shoulder. Adjust your sizer die to just kiss the shoulder and not set it back any more than .001 inch and you will get case life just as long as with a non belted case.
I've been loading .300 Weatherby, .375 H&H, and 7mm STW for decades in some cases and the cases last just as long as they do in 7mm-08, 30-06, .416 Rigby... all cases without belts.
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  #9  
Old 04-14-2010, 04:46 PM
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Other than the OP states he just doesn't like a belted case, I would agree with you, Big Bore. The only belted chambering I have anymore is a 7 RM and, in my mind, neck sizing and just kissing the shoulder gives me two stabilization points in the chamber instead of the one in the non-belted chambers. The belt at the base and the shoulder at the front should give much better chamber alignment. Hopefully, the bore center matches that of the chamber!
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  #10  
Old 04-14-2010, 06:30 PM
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kickinback welcome first off!

Like kdub and a few others have said, there is nothing wrong with having a belted case. I have a 338, 300,7mm, and a 264 and they all shoot very well. If you are worried about brass reliability, there is great brass out there like norma that should last a long time if you just bump the neck.

If you are looking at getting a wildcat, I got to thinking that instead of the 270 you said you wanted, maybe you should look at the 280 ackley improved. It is a caliber up from the 270, but it is in the same class as the 270. Its easy to fireform your brass and there is a wide variety of bullets for the 284. Just a thought. I hope that whatever you decide your project goes well and you have fun with it.
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  #11  
Old 12-04-2011, 07:23 PM
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Quote:
Originally Posted by jeffro View Post
I hope that whatever you decide, your project goes well and you have fun with it.
My prayer is that you return from AFG whole in both body and mind. May I extend my most sincere thanks and appreciation for your service to our nation.
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  #12  
Old 12-09-2011, 01:58 AM
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sounds like you have a really great rifle chambered in one of the best "all around cartridges" there is. I have hunted small sika deer to moose with a 300 win. Mag. Using 150 gr. Barnes x bullets with very little meat destruction. Also hunted antelope with a .338 win. Mag using barnes x bullets with good results. Of course you still have to make correct shot placement as with any caliber. Just a suggestion, build the wildcat cartridge you want FROM scratch, or get a different reciever and start from there. The .270 is a great cartridge too. A 25.06 or .280 in an ackley improved would be an interesting and excellet cartridge for a long distance plains rifle depending on how much recoil you want, before going to the various 300 and 338 magnum calibers. Best wishs from an old army sargent, don't take unecessary chances. Carry a good combat "back-up knife" as those afganistans like close-up and personal get to know you kind of relationships. Come back home to us with all your body parts soldier.

Last edited by bibleman; 12-10-2011 at 10:06 PM.
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