Reloading check weights

frogfurr said:

I recently won an Ebay bid on a used RCBS 10-10 scale. I do not have any check weights. I have always used bullets as check weights. I am considering buying my first check weight set. Why are there several weights in a check weight set. Shouldn't one be enough?

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This way you can check the weight at which you are reloading at to the nearest 1/2 grain.
I have the older RCBS deluxe set which I think is superior to the new set.
#98992

Edit: Apparently the new deluxe set #98993 has the same weight as the old set (510.5 gr) but in a different form factor.
For most people that don’t plan on loading over 60.5 grains the standard set will suffice.

I have a set of Ohaus check weights. I sometimes cheap out on some things but for standards, I get the best available.
All electronic scales, and mechanical to some extent, can be dead on at one range and off at another range, so multiple check weights are a good thing.
Bullets make really bad checks. Even the best typically vary by a few grains.

frogfurr said:

I recently won an Ebay bid on a used RCBS 10-10 scale. I do not have any check weights. I have always used bullets as check weights. I am considering buying my first check weight set. Why are there several weights in a check weight set. Shouldn't one be enough?

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Everything wears and scales/balances wear in the range they’re most used. Strain gauges, knives & troughs, pins & agates - all things wear. It’s necessary to check the scales/balances across a range to check for uneven wear. It’s also why calipers and anvil/thimble measures come with a variety of standards.

frogfurr said:

Advice well received. I ordered the RCBS 98993 set. I have always felt guilty not having the check weights. I'll do a bullet weight to check weight comparison when they arrive.

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There appears to be an error in the description on the RCBS website.

• Deluxe set
• 510.5 grains for bullets, cases and powder
• 1x200, 2x100, 1x50, 2x20, 1x10, 1x5, 1x1, 1x.5
• 1 forceps

If my math is correct there are 4 grains missing.
Mine has (2) 2gr weights which are not shown in the picture or description of the new set.
Without those 2 weights you cannot make any weight desired.
That would piss me off.
If they are missing on arrival I would call RCBS to make it right.
If they say that 2gr weights don't exist I would ask for (4) 1gr weights

frogfurr said:

View attachment 1073809

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As your description shows they advertise 510.5 grains for the deluxe set and if you add everything up it's only 506.5 grains.
My problem is that it doesn't show the 2x2gr in the picture either.

frogfurr said:

It's not my description but rather theirs. Copied and pasted .

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I understand but do the math and look at the photo I posted.
As I stated above if it arrives without the (2) 2gr check weights I would call and bitch because it doesn't add up to the advertised 510.5 grains.
1x200 + 2x100 + 1x50 +2x20 + 1x10 + 1x5 + 1x1 + 1x.5= 506.5

frogfurr said:

View attachment 1073809

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Their description is clear as mud when you do the math.

thump_rrr said:

This way you can check the weight at which you are reloading at to the nearest 1/2 grain.
I have the older RCBS deluxe set which I think is superior to the new set.
#98992

Edit: Apparently the new deluxe set #98993 has the same weight as the old set (510.5 gr) but in a different form factor.
For most people that don’t plan on loading over 60.5 grains the standard set will suffice.
View attachment 1073800

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I have an old Lyman check weight set that looks just like that—from eBay. Great for checking your scale as you described.

Slightly off topic, but when I read the post title, I thought, "How do you reload check weights?"

I've always been a touch odd.

frogfurr said:

We'll see what comes in the package when it's delivered. It's not like I can drive down the street and look at something like this.

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I'll bet it comes with what you need and the description is just bogus.

Standards are important.... getting what you paid for is also important

The old Deluxe set had 12 check weights. The current sets now have 10 check weights. Missing are the 2 x 2gn weights.
Downsizing is a cost savings measure for both the manufacturer and consumer. Trouble is, they didn't update the product description.
If you're unhappy about it, return the weights and move on.

Otto said:

The old Deluxe set had 12 check weights. The current sets now have 10 check weights. Missing are the 2 x 2gn weights.
Downsizing is a cost savings measure for both the manufacturer and consumer. Trouble is, they didn't update the product description.
If you're unhappy about it, return the weights and move on.

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It is still illogical to provide (2) 2gr weights in the standard set and not in the deluxe set.

Bullets are not good check weight, even premium bullets don't always weight exactly what there supposed to.

I use multiple check weights while tuning and calibrating a scale, bullets can be used without issue if they exact weight is known and marked as such, ( 89.6) for example. I always zero my scales to a check weight close to the target charge I’m working with prior to loading then when leaving a session I will place a check weight in the pan rather than starting completely over at the zero V groove which can be a deva sometimes but we don’t weigh zero’s do we ..

Use weights close to the weight you are checking. The weight may be more off at the ends of the high and low range so I just use a weight close to what I’m going to weighing out that time. Basically if I’m using 22 grains of powder I’d use a 20 grain weight and verify the scale at 20. If the scale reads the 20 correctly I’d be fairly comfortable with it being on at 22. I wouldn’t verify at 50 grains then load 2.7 grains of bullseye with the same confidence as if I verified at 5 grains.