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Author Topic: 22-250 acc problems  (Read 1587 times)

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Offline Kapow

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22-250 acc problems
« on: January 27, 2003, 11:31:52 PM »
I rescently inherated a parker hale 22-250 from my gramdfather (I love this gun its been in grandpaws locker for ever and it was one of the guns I learned to shoot with )  Ive been reload for about two years just my 300 win mag  rounds mainly.  Ive had really good results with most of my loads and have been very pleased.  but this 22-250 is killing me no mater what I load it wont groop.  I can put the loads my grandfather loaded in and shoot 4 rounds under a nickel.  Ive tried to load the same loads but with no sucess. Unfortinally I cant ask him what to do.  he has written on the box 53 gr sierra h.p.b.t. 35.5 gr of 4320 ( I dont know if thats IMR. or what but that is what is on the box) with cci primers. I trim and full size all my brass as well as polish them. Ive tried 35 gr vmaxes to 60 gr hpbt I know the twist is 1 in 14 so heavy rounds wont work the latest failure is 52 gr hpbt with 35.5 to 36 grains of 4320 IMR. and 33.5 gr of 3031 IMR. still no joy. If any one has ran in this problen please help or tell me what Im doing wrong.  Thanks
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Offline jhm

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22-250
« Reply #1 on: January 28, 2003, 04:26:26 AM »
kapow try only neck sizing the brass as they come out of your grandfathers gun he may have been doing it that way, do you have his dies also to check?   :D   JIM
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Offline Kapow

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Necking
« Reply #2 on: January 28, 2003, 10:16:00 AM »
I have His dies as well but thanks I will try just necking them. what dose that do for the grooping?
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Offline John Traveler

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Neck sizing
« Reply #3 on: January 28, 2003, 10:35:24 AM »
Neck sizing only keeps the uniformity and case-to-chamber fit that is obtained in firing a cartridge in a specific chamber.

Almost all competive shooters (BPCR, benrest, etc) go for neck-sizing only.  That should tell you how important case uniformity is.

Oh, by the way, did you change primer brands in making up your reloads?  That can have a considerable effect too.

Best wishes and let us know how it works out!
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John Traveler

Offline hubbard

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22-250 acc problems
« Reply #4 on: January 28, 2003, 11:07:38 AM »
had a 222 that absolutely wouldn't shoot unless the bullet was seated as far out as you could get it and still stay in the brass. this was my 1st lesson in seating the bullet so the ogive is in contact with the riflings.
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Offline Muddyboots

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22-250
« Reply #5 on: January 28, 2003, 12:39:53 PM »
Kapow,
Measure your granpa's rounds to the ogive and measure chamber to get distance off the lands that he was using. 0.005 can make all the difference one way or another. Primers and case prep can be part of the problems as well. If you are full length sizing, bump shoulder back 0.002 at most. If you don't have a Stoney Point to measure case and chamber, suggest getting one. Helps provide consistency in your loads.
Good luck!
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Offline John Traveler

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.22-250 accuracy
« Reply #6 on: January 28, 2003, 01:02:34 PM »
Kapow,

I just had a thought.  There were some questions to the technical editor of a shooting magazine back in the late 1960's of mid 1970's about Parker-Hale rifles.  The question had to do with barrel groove diameters of foreign-made rifles in that caliber.  The .22-250 caliber was recently standarized by Remington in the mid-1960's.  Prior to that it was a sorta "wildcat" with different case configurations.

Any chance that your Granpa's rifle is one of those, and that you using standard .22-250 sizing dies is making the accuracy problem?

Let us know how you make out in getting it to shoot better.
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John Traveler

Offline jhm

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22-250
« Reply #7 on: January 28, 2003, 01:42:58 PM »
kapow John answered the reason I was stating to try neck sizing only also if you have your grandfathers dies see if your loads measure the same length if you have any left from his loadings its possible that by just putting his dies in your press it could be off a little.  The powder is probably imr4320 as that is what is shown in a old sierra reloading manual I have here dated 1971 shows 35.3 of 4320 for 3500 fps with a 53 gr hp.  Keep trying thats part of the fun. :D   JIM
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Offline Kapow

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dies
« Reply #8 on: January 28, 2003, 10:34:03 PM »
Lots of good info here Some stuf I havent tried yet and now that Jhon mentioned it I have heard some thing about that on old parker hail rifles ill have to check that out I also heard some thing about the riflings being diffrent so I will have to recheck that to. I have tried to seat the bullets to the same length though as his.  Is it possable that the old dies dont set in my new press the same the are both RCBS. he had a really old RCBS press the size of a house. Mine is a small low end one not realy fancy. Im using cci primers as well (the same as GP. did)  I will look in to getting a stoney point ? too not sure what that is but I have a good idea what dose.  Thank you all for you time and info
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