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243cal reloading need help

 
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  #1  
Old 07-15-2012, 09:14 PM
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243cal reloading need help

I have a rem vtr in 243cal and can not get it to group better than 1 1/2 group at 100yrds using Berger vlds 95s I have seated them from 2.700 out too 2.750 and have been using cci primers and IMR 4350 from 38 to 41grs is 95gr bullets the right weight? Should I go too 100gr pills? Or lighter?
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  #2  
Old 07-15-2012, 10:21 PM
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Re: 243cal reloading need help

Try seating 5 rounds .010" in the lands, 5 .010" off the lands, and 5 .040" off the lands using a 40grn charge of Imr 4350, see which 5 group the tightest and make small seating depth adjustments, then work on getting your velocity, es, and sd up to par.
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  #3  
Old 07-15-2012, 10:56 PM
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Re: 243cal reloading need help

IMO... seat them .020 off the lands... and do a OCW test... run of at least 15 rounds... loading 3 rounds each... starting near book Max and loading down .3 grains for each group of 3 rounds... and then start shooting first from your lowest charged group... working up... watching for pressure signs... while shooting each 3 round group at one target each... while shooting in a round robin sequence.... low to high... and then starting another round again.... it's the OCW system. Don't look for your best single group... but look for the best three groups that are together... then choose the center group's charge.. and then do it all over again with that same charge, but with different seating depths.... usually the closer to max.. the better they group.
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Old 07-16-2012, 06:41 AM
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Re: 243cal reloading need help

Let me get this right if the measurement to the lands is 2.900 I need to seat them at 2.880? I've been out school for awhile ha
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  #5  
Old 07-16-2012, 06:47 AM
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Re: 243cal reloading need help

Thats correct if you want a .020" jump. its more accurate to measure from base to ogive if you have the equipment.
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  #6  
Old 07-16-2012, 06:54 AM
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Re: 243cal reloading need help

that is correct....

closer to the lands the better in most cases... and usually hotter the better.... BUT.... NOT in all cases.... .020 is just a starting point. BUT... you can also take the earlier advice from Backwoods and try them inside and outside the lands. BUT FIRST.... get the load close... then mess with the seating later. If your into the lands.. pressure will go up... but that can be okay unless it's too hot.

Get the powder charge right or close first...

shoot 5-8 little 3 round groups at 5-8 target spots... but load them different in at least .3 grains different... up to max... but shoot the lower ones first and work up.... and allowing at least 2 mins between each shot for barrel to cool.

Look for your best 3 groups that are side by side... and choose the charge of the middle one.
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  #7  
Old 07-16-2012, 07:22 AM
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Re: 243cal reloading need help

I believe Berger recommends a their 87gr for your 1:10 twist.
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