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22-243 problem

 
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  #8  
Old 03-18-2013, 11:50 PM
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Re: 22-243 problem

I would get ahold of him but he got it from him a year ago and just did get real serious about dialing it in so I dont have contact info anymore.

He is shooting 75gn Amax's and just got some 68gn bergers.
What is your load? OACL?
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  #9  
Old 03-18-2013, 11:58 PM
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Re: 22-243 problem

Quote:
Originally Posted by JeffP40 View Post
Several things here. First, size a case properly. That does not mean size it all you can. Back off your sizing die about half a turn or better. Size the case and try it in the chamber. If it is tight, turn the die down a little. Try this until it goes with no effort. If this cannot happen, check the brass length. Trim length should be .010 under max. If it is not too long and it still will not chamber easily, even with the die set as far down as it will go, then you will probably need to try another sizer die. Sometimes one will not do enough with a particularly tight chamber.
Once that is done, use then longest bullet you have with a fairly blunt ogive. The amax is better than the vld, but use something even longer, if possible. If you still can not get rifling marks on the bullet, the lead must be either way too long, or burnt out. I can't imagine Pac-Nor making a chamber that long, that makes me think it is eroded so far it needs to be set back and re-chambered.
One other thing, make sure the expander ball is not pulling the shoulder of the case out upon sizing. If it sticks in the neck, it can do that. I once had trouble with a 243 that stuck badly and ruined several pieces of brass because I had not lubed the necks. I have found that simply using a plastic bore brush (not a bronze one, that makes it worse) in a drill does a good job cleaning the necks and make the expander ball pull through the neck easily. On the occasion that it is still a bit tough, I put a little lube on the brush and use it that way.
Try these things and let us know what you find. I am always curious with these things, and I like to learn.
Will do thanks.
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  #10  
Old 03-19-2013, 12:33 AM
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Re: 22-243 problem

I am using lapua brass 40.5gr. of H4831sc 90gr. berger VLD's with a base to bullet ogive length of 2.35 i beleive. I would have to measure OAL and can do that tomorrow but i can tell you with my 90grainers they will not fit in the mag box of my rem 700. It could be that the barrel is just shot out. 22-243 has never been known for being easy on barrels.
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Remington 700 7mm SAUM Magnum Research Barrel
Remington 700 7mm Rem Mag Ultralight
Remington 700 22-243 Supressed
Savage Target Action 6mm-284
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Savage Predator Hunter Max1 6.5-284 Norma
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  #11  
Old 03-19-2013, 12:47 AM
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Re: 22-243 problem

My brother thinks it had 300 down the tube when he got it and i bet he has less than 25-30 down it himself. Cant imagine it being shot out in
less than 500 but who knows if 300 was the real #.
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  #12  
Old 03-19-2013, 12:51 AM
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Re: 22-243 problem

Yup who knows if 300 is the real number. I would have a smith look at it, maybe he has a bore scope to inspect the throat and take a chamber cast
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Remington 700 7mm SAUM Magnum Research Barrel
Remington 700 7mm Rem Mag Ultralight
Remington 700 22-243 Supressed
Savage Target Action 6mm-284
Savage Target Action 6.5x47 Lapua
Savage Predator Hunter Max1 6.5-284 Norma
Savage Predator Hunter Max 1 22-284 Norma
Savage Bear Hunter 338 Win Mag
"Gotta Kill It Before You Can Grill It"
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  #13  
Old 03-19-2013, 06:35 AM
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Re: 22-243 problem

I agree with the bore scope and the casting. That should tell a lot.
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  #14  
Old 03-19-2013, 11:27 AM
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Re: 22-243 problem

get the hornady OAL gage and a comparator set to find the lands (cartridge overall length). You will need to size down a modified 243 case with a bushing die to allow the 22 bullet to slip fit. I suspect you already have a redding bushing die, probably a 243 die with smaller bushings for your wildcat? so you just need to measure the ID and OD of your fired case and get the corresponding bushing & expander button for the modified case

get the sinclair case length gage to measure maximum trim length (case overall length).

when trying out the sizing method as previously stated, you can use a dry erase marker to color the brass and see where its hitting. this "may" give you some usable information depending where it marks.

have you eliminated the other variables? tried a mounting a different scope, for example? gone back to the original loads that worked best for the first owner? checked bedding, barrel to stock clearance, torque settings on all fasteners, etc? I could go on and on about the many things that have caused accuracy problems for me that didn't have anything to do with my reloading!
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