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Post by mshm99 on Apr 25, 2009 22:49:48 GMT -5
Okay now that we have sorted out the moly bullet issues does anyone have an opinion on the value of:
1. Uniforming primer pockets
2. De-burring flash holes
3.Turning case necks
mshm
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Post by Al on Apr 26, 2009 2:41:34 GMT -5
I do all of it for my bolt guns, only because I've been known to be accuracy anal at times and it's one less excuse for when I'm having a bad shooting day. lol
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Post by ET on Apr 26, 2009 6:02:05 GMT -5
De-burring flash hole (prefer the Lyman tool) and add a slight chamfer along with case neck turning (prefer Forester Tool) to help center bullet to bore entrance made my .223 a tack driver. Also a full case powder load of Varget helped add to accuracy.
A step further I employ is look for brass that came from same lot # if possible and weigh each case for plus or minus 2gr. (for .223) when segregating my cases into groups. Obviously all brass is not created equal because mine prefers Military cases over store bought that does not require trimming as often.
You may think this is going to an extreme but if you want the best accuracy a particular rifle is capable of IMO the extra attention and detail is worth it.
Ed
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Post by Richard on Apr 29, 2009 20:01:23 GMT -5
mshm99 As a benchrest shooter I could go on and on in detail about prepping brass. Here's the thing..........To really take advantage of fully prepping brass ( neck turning, primer pocket reaming uniforming flash holes, deburring the flash hole on the inside, chamfering the necks on the inside and outside and weighting) is a lot of work and you may not reap the results if you are shooting this brass in a "factory chamber!"
If you neck turn for a factory chamber, you will reduce the size of the neck (which is already slopping around in an oversize/loose neck) and create more runout of your loaded round. Neck turning was designed for custom chambers where the shooter chooses a smaller neck chamber and cuts his brass for a tighter/uniform fit. A very light cut (provided the runout on the brass thickness is not too much) to just "clean up" the brass might not be too bad. The other items listed above could definitely help your accuracy to a degree. Weighting brass for a "deer" rifle will not show you enough improvement to make it worth the effort. Yes, it might effect your velocity by a few FPS, but the deer will not know the difference.
For benchrest shooting or for long range extreme accuracy, fully prepped brass along with a custom chambering will definitely show accuracy improvements. Of course, a custom barrel should go along with it!
Richard
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Post by joe21a on May 4, 2009 11:46:49 GMT -5
I think Richard hit the nail on the head. Years ago I loaded rounds (308 and 300win mag) with the total prep amd just loading them. I could see no difference in the groups that the two hunting rifles shot. They both shoot a consistant 1" or less group at 100 yd with either ammo. So needless to say I skip all that extra work. The only thing I do is be very consistant with how I reload and all way try and use a powder the giver me a full case if possible so I have a compressed load.
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