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#1
09-21-2009, 06:19 AM
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The OAL of a cartridge is personal prefrence as long as you do not jam the bullet into the lands. I prefer .003 off myself, because it is an easy setting to work up. You find the "just touching point" using black magic marker and back off 1/8 of a turn with your seater plug. Some prefer .010 off and some like just touching. You might try all three and see which seems to work for you. Just understand that the closer the tolerance the least forgiving the load is for dirt and dust.
I looked up Benchmark for you on a data site that had 104 loads for the 243posted. There was but one load for Benchmark and only one bullet weight, a 70gr over 39.3 gr with no group size but the velocity was 3400+ fps. So sounds like you should find something for the 55 at 39-42 grains. Just work up by .5 grains. Ah, just found it see if this does not help you: http://www.reloadersnest.com/detail....rk&LoadID=6373 Best, Ed
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The three Rs: Respect for self; Respect for others; and responsibility for all your actions. "Is life so dear, or peace so sweet, as to be purchased at the price of chains and slavery? Forbid it, almighty God! I know not what course others may take, but as for me, give me liberty, or give me death!" 
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#2
09-21-2009, 10:38 PM
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I found a load for a 55gr jacketed bullet in the latest edition of the Lee reloading manual. Starting load is 39.0grs never exceed 41.5grs. I tried those loads I cooked up today and shot a genuine MOA group, I shot two acutally but one group was a bit larger because I flinched. I am now loaded up to 41.5 but its too dark to shoot now so I'l try them tomorow.
Minihuntur 
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Happiness is a full clip.
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#3
09-28-2009, 10:12 PM
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Now I've got a problem! I shot two great groups, .42 and .66 but the gun always shoots a 1.8in. group first. The barrel has to warm up before it shoots good. I think I'll have to use a faster powder or else free float the barrel. Sadly, there is a horrible reloading equipment shortage in Canada right now. Nothing is making it across the border!!! You Americans are hoarding it all.
 There are only 9lbs of powder in the biggest sporting goods store the province. 9LBS!!! The smaller stores dont have any of the right stuff either. Anyway, would freefloating help? Thanks.Minihuntur
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Happiness is a full clip.
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#4
09-29-2009, 08:14 AM
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I would just keep tinkering with it.....BTW, those were impressive groups!
I'd save the floating till much later.JMO...BTW, loading stuff here is not much better!!! Dan
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Lifes not meant to be a journey to the grave with the intentions of arriving safely in a pretty and well preserved body, but rather to skid in broadside, thouroughly used up, totally wore out,loudly proclaiming.... WOW.....WHAT A RIDE.......
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#5
09-30-2009, 08:18 PM
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Sadly theres not much more tinkering to do unless I get some other powder. I cant find ANY! I'd like some IMR-4831, Varget, or Winchester 760 but there is none anywhere. However, would trimming the cases longer and then seating the bullets farther out make a difference?
Minihuntur
__________________
Happiness is a full clip.
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