I have been wondering, how accurate of a charge should I find to be acceptable for 100yd target shooting? I have been using a Mack20 scale, and charging every round to be within 0.02gn. I am now wondering if I am overdoing it for 100yd target shooting with 223, 22-250, and 7mm08. I noticed that products such as the Chargemaster seem to be pretty popular amongst members here, which happens to be spec'd to be accurate within 0.1gn. Would charging within 0.1gn be an acceptable target for my type of shooting, which would save me a bunch of time over 0.02gn?
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How accurately should I be charging my loads?
- Thread starter 7mm0late
- Start date
+/- .1g is plenty good. If you are weighing to .02g now then you should be sorting your cases by exact volume, otherwise you are being OC with the charge for no reason other than to be OC. There are other things that affect accuracy more than charge weight. Consistent neck tension is one.
Depends on where you are in node. But at 100yds you can get away with almost anything. Below is either 275 or 300yds, can't remember. Bottom of node for this load it 47.8ish, pic is 3 shots each at 48, 48.5 & 49. Other than wind, the vertical is pretty good. I don't know whether I pulled top red one or was it out the top of the node.
Point is, for 100yds, let the CM eat if that's your style.
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Point is, for 100yds, let the CM eat if that's your style.
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Good point ! I've never even seen a .233 case...
JKAnd [MENTION=29556]mtrmn[/MENTION], grains is typically abbreviated as gr, as in 140gr projectile, etc.
And just for kicks, if you're into needless conversions, 1 gram is approx. equal to 15.4323 grains and conversely, 1 grain is roughly 0.064799 grams.
Good point ! I've never even seen a .233 case...
And [MENTION=29556]mtrmn[/MENTION], grains is typically abbreviated as gr, as in 140gr projectile, etc.
And just for kicks, if you're into needless conversions, 1 gram is approx. equal to 15.4323 grains and conversely, 1 grain is roughly 0.064799 grams.
You must be using some mighty fine powder! I zero the balance beam and I can easily tell when an individual granule of Varget or 4064 pushes the pointer past the zero line. I have yet to feel the need to break out the razor blade to subdivide a granule.
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I would disagree with that statement, the current 100 yard world record was set with ammo that was weighed to the kernel on very expensive Lab Scale
With a decent OCW type load workup, +/- .3gr would be good to go for just about anything other than benchrest at 100-200 yards.
For powder, I've been using either IMR 4320 or IMR 4350 depending on caliber. I typically am lucky enough to throw loads within my .02gn tolerance in under 5 attempts per cartridge. For now, I'm just going to be happy with a 0.1gn tolerance, and eliminate most of the throw, weigh, re-throw, weigh, dance over 0.02gn.
Honestly, this is a question that may be best answered by yourself through testing, for your load(s), for your rifles. For example, use your current approach to create five loads 0.05 or 0.1gr apart to cover +/- 0.1gr or 0.2gr around your target.
Before you give up on your technique you might want to see if it's doing you any good . . . or if it's unnecessary.
Before you give up on your technique you might want to see if it's doing you any good . . . or if it's unnecessary.
