Equivalent Scale to Gempro 250

[Rocketvapor]

"1. how accurate a 50grain lyman check weight ?
2. how accurate is a vintage 5 gram Ohaus check weight?"
Are these brass check weights?

Do a search on Lyman grain check weights.
Older sets of Lyman check weight weren't all that accurate.
Newer sets are better
https://www.lymanproducts.com/scale-weight-check-sets

Here is a nice looking Ohaus 5 gram weight, ASTM Class 6, non-magnetic Stainless Steel, accurate to 2 counts on a milligram scale. Look up weight classes.

https://www.grainger.com/product/5R...3a6427a4972a1d0a913842c97b40a433&gclsrc=3p.ds

ALMOST GOOD ENOUGH - -
TO DO A YOUTUBE REVIEW OF A Milligram SCALE.

Would a milligram or two of check weight error matter down range?
What is nice is that replacing a damaged or lost weight years from now will end up close to the same value/error. (SAMENESS IS IMPORTANT)
Error in a ASTM Class 4 or better would be better.

Sorting primers who would do that?

Tare empty block, flip 100 primers from one block, get average, then sort.
(scale counts in 0.005 grains in grain mode, or 0.0002 grams in gram mode)

 

[Tesoro]

This short video illustrates how quickly the fx120 resolves and displays weight.

Id be fairly confident in Lyman or Ohaus check weights.

It really dosent make any diff how precise your check weights are, within reason. You are not buying diamonds! You tare or zero your check weight for your powder charge for a reference. All all that really matters is repeatability from that point on when developing a load.

 

[Kracken McGraw]

It really dosent make any diff how precise your check weights are, within reason. You are not buying diamonds! You tare or zero your check weight for your powder charge for a reference. All all that really matters is repeatability from that point on when developing a load.

Exactly.
Quality scales are important for the loaders time and peace of mind of the results of the powder charge in the case. Fluctuating strain gauge scales will eventually drive the hand loader insane, figuratively speaking.

 

[Rocketvapor]

@JFrank
I haven't tried the outliers yet.
Wife and I shoot 600. Loading for a trigger time session and a monthly match keeps me busy.
Keep them separated.

The how? I take an empty tray. Tare it. Take a full tray and flip 100 into the it. That gives me a tray average.
Then just one at a time sorting near average, a little high, a little low, and the rally high and low.

 

[Rocketvapor]

Accurate check weights matter when troubleshooting/evaluating scales.
How do you know if your power line conditioner is working properly?
Your granite slab heavy enough?
Static driving you insane?
Your scale hasn't drifted off calibration?
For reloading, SAMENESS matters.
I have a set of SS gram weights OVER 20 years old that compare favorably to New weights. They got sameness (stability) and accuracy.
I just love it when folks prove their scales with kernels of Varget.
Look close, one kernel of Varget.

Really good weights are only needed when making Youtube videos

 

[Rocketvapor]

@JFrank
I don't shoot well enough to tell the difference
When I load a batch for a match, I just try and keep everything the same, just in case it matters.
Load 100 or so for me, 100 or so for the wife, for some practice and the match. I still get some 9's.

 

[Rocketvapor]

A few months back I loaded up some for the wife with CCI450, CCI41, and Win41. All sorted primers and same load as best I could do.
The groups with the sorted Win 41 were slightly better that trip.
We don't have enough Win41 left to load a batch
I can't tell the difference in the CCI450, or the CCI 41, which I have plenty of.
Also have a gazillion WSR (old brass colored) but they don't seem to survive the loads we use. Sort of hot for a 22N. I think the Ginex, brass colored P3 has the same pressure limit as the old WSR.

Kind of hard to evaluate the finer details of reloading when you are getting better (and still have room to go) with more trigger time. Wife is closer to making Master than I am. Someone that routinely shoots cleans would be better to comment on primer sorting. I do it because I can and it MIGHT make a difference.

 

[Rocketvapor]

What I CAN SEE is powder charges to maybe 0.2 grain. So, I try and load to much less than this. Go back to post #32 of this thread for 'calculator' drops for charge.

I think we have determined that the FX120 is at least equivalent to the old GemPro 250
(the original question of this thread)
Most users seem to get kernel of Varget accuracy IF you put it on a granite block, get rid of fluorescent lighting, all drafts, stable temperature control, use a power conditioner and static safeguards.
Check out all the FX120 threads on this and other forums.
That will get you a rock solid 1 milligram.
What would that $20 scale do with all those precautions?
LOL

 

[Infrequent Shooter]

In addition to several other scales, I have one of these, which is an amazing value. Several people have bought them based on my recommendation and they are all of the same opinion. It is available on Amazon.

this just came in the mail today. from your recommendation! excellent. weighed some SMKs. 130 gr were mostly .02-.04 close. wow on both smks and scale itself. used ohaus 5 gram for test. best thing since sliced bread. 110% approval.