RCBS chargemaster consistency

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MartyK2500

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Anyone else using chargemaster combo that :

If set for a set amount on grains, let's say 42.0gr
It pours constantly 42.0gr and it stops (got bushing which really helped)
I can keep powder scoop for 2 minutes on scale and still says 42.0gr
I remove scoop and then put it back (still full), one time out of 7-8, it will now display 42.1gr
I take about 3 kernels of varget out and i'm back to 42.0gr

Wondering if i'm going nuts or if scale had inconsistencies
Should i remove scoop and reweight it like i do?
If i don't do it, it "gives" very constabt readings

Details : on a very level surface, in a small room with very little air movement
 
I see that the odd time that when a charge sits for a few minutes it will suddenly read .1 heigher. I just figure it was 42.09 and the scale as its constantly measuring decides its 42.10. I thing if it went to the second decimal place you would see why.
 
I throw the charge with the Chargemaster then reweigh it on my Acculab scale. But I am looking for .02 of a grain accuracy in weight. Before I had the Acculab scale I use a RCBS digital scale and always lifted the pan and set it back on the scale to reweigh the charge.
 
What is this acculab scale? At this point are you better off throwing let's say 41.6gr with the charge master then trickle your way to 42.0gr on a better scale?
 
I believe this is the scale hes talking about
ht tps://cambridgeenviro.com/productDetail.php?122g-x-0.001g-AandD-5-Year-Warranty-Top-Loading-Balance-6145

Its $710 but reads to .001
 
Ah yeah the FX120, heard about this a few times.
Even saw a mod which a guy had plugged a motorised trickler and automatically trickled to weight.
Anyone here done it?
 
Yeah... a number of people have done it and swear by it. My next upgrade on the list.

Cheers,
 
the chargemaster is +- .1 grains

Whatever it reads, the real weight is +- .1 grains
If you are ok with that level of accuracy, it's fine.
I'm not ok with +- .1 grains, so I sold mine.

Next purchase will be the FX-120I with autotrickler.

But right now, it takes me 15 seconds or so per charge to throw and trickle to +-.02 on my gempro 250 so it's viable for my needs now.

The fx120I reads faster with less drift. The gempro needs to be re-calibrated almost every 2 throws and is long to read. Plus, you need to press the weighting pan every time you trickle a bit, to reset the weight and to prevent the anti-drift algorithm from thinking that the trickling is not happening.... or the weight stays the same. Once you get used to doing it, it's quite fast, but it's quite an annoyance also.
 
I wouldn't have sold it, anyways won't sell my chargemaster.
Isn't it better to throw let's say 95% of your charge from RCBS and finish off with FX120 and auto trickler?
 
I am going to sell mine after I upgrade;


or this;


That being said - What I do is use my ChargeMaster to get to (ex) 41.9gr and then I use GemPro250 and a trickler to get it up to 42gr. Works well but it is a bit slow.

Cheers,
 
I think that for 99% of people +/- 0.1gr is just fine. If you're shooting competitively at 1000m with a custom built rifle with an expensive barrel then a higher level of accuracy would be a good thing and a person would be able to notice the improvement.
I've used my chargemaster combo to build loads which will shoot sub half moa five shot groups from my 223 rifle. I think most of the electric scales are accurate enough for most people unless you are OCD and looking for excuses why you are not shooting the groups you think you should be.
There is no way I am ever going to weigh my charges twice with two different scales or spend $700+ on a scale just to increase the accuracy to labratory levels, like most people on this site I'm not a good enough shot to notice the difference.
 
GreenBob said:
I am going to sell mine after I upgrade;


or this;


That being said - What I do is use my ChargeMaster to get to (ex) 41.9gr and then I use GemPro250 and a trickler to get it up to 42gr. Works well but it is a bit slow.

Cheers,
Click to expand...

In the video speed is not as worst as i expected using powder scoops.
Do they have better trickler setups available? That guys setup looks ackward
 
cr5 said:
I think that for 99% of people +/- 0.1gr is just fine. If you're shooting competitively at 1000m with a custom built rifle with an expensive barrel then a higher level of accuracy would be a good thing and a person would be able to notice the improvement.
I've used my chargemaster combo to build loads which will shoot sub half moa five shot groups from my 223 rifle. I think most of the electric scales are accurate enough for most people unless you are OCD and looking for excuses why you are not shooting the groups you think you should be.
There is no way I am ever going to weigh my charges twice with two different scales or spend $700+ on a scale just to increase the accuracy to labratory levels, like most people on this site I'm not a good enough shot to notice the difference.
Click to expand...

Exactly what I am doing, shoot long range competition with a full custom target rifle. TR style, iron sights rife supported by the shooter with the aid of a jacket and sling, no rest. OCD, you betcha:dancingbanana:, weight sorted Lapua brass into .5 gr batches. Powder weight to +-.02 gr. I don't trickle powder, I find it faster to trickle or pick kernals of powder out of the pan with my fingers.
However I don't weigh or measure my match bullets, clean primer pockets or weigh primers.

If I am shooting against you in a competition I would be happy if you are satisfied with +-.1 gr of powder. Even with all this prep no matter how much time is spent making the best ammo that I can, one missed wind call or getting caught in the aim at 1000 yards can throw the shot into the 3 ring.
 
MartyK2500 said:
Isn't it better to throw let's say 95% of your charge from RCBS and finish off with FX120 and auto trickler?
Click to expand...

Huge loss of time, just use a powder measure to throw a volumetric charge .2 grains under, takes 1 second, and then trickle.
No need for a chargemaster to drop a powder charge....
 
Last loads I shot off the Chargemaster in a 30-06 - 10fps extreme spread... I suppose that leaves room for improvement. ;) Though that 0.01grain would amount to much more variation in a small case with fast powder, say, 300BO and h110 rather than IMR 4831 in 30-06.
 
There are a few articles out there on how much the charge weight actually effects your velocity. (down to the. 01 of a grain) and from what I have read it, it's not as much as you would think. When it comes to bench rest maybe I would get it down to the. 01 gr. But that's a lot of extra time for a possibly unnoticeable improvement.
 
http://precisionrifleblog.com/2015/04/18/how-much-does-sd-matter/

Here is an article which speaks about how much lowering your SD of your ammunition really helps. If you read the article, there is a graph that shows the hit percentage increase on a 20" circle at 1000 yards. Going from a SD of ten (which is pretty good) to an SD of 3, there is only a 1% hit increase at 1000 yards. Interesting to think about how much extra time you are willing to spend for 1% improvement
 
maynard said:
Exactly what I am doing, shoot long range competition with a full custom target rifle. TR style, iron sights rife supported by the shooter with the aid of a jacket and sling, no rest. OCD, you betcha:dancingbanana:, weight sorted Lapua brass into .5 gr batches. Powder weight to +-.02 gr. I don't trickle powder, I find it faster to trickle or pick kernals of powder out of the pan with my fingers.
However I don't weigh or measure my match bullets, clean primer pockets or weigh primers.

If I am shooting against you in a competition I would be happy if you are satisfied with +-.1 gr of powder. Even with all this prep no matter how much time is spent making the best ammo that I can, one missed wind call or getting caught in the aim at 1000 yards can throw the shot into the 3 ring.
Click to expand...

Yup, you're one of the ones that doesn't fit into the most that I refer to, for someone shooting at your level it makes perfect sense to eliminate every possible variable leaving results riding on your shooting ability but for the vast majority of shooters there is no point going that extreme since most can't shoot consistently enough to notice a powder charge difference of 0.1gr.
 
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