GemPro-300

[pirate ammo]

is anyone using one and does it work well,good or junk?

 

[Turbulent Turtle]

I had a Gempro 250. As with most all strain guage scales, it was a drifter. I put it away after a while and got and A&D. Funny thing thing though, I contacted the Gempro factory and told them about the drifting. They asked if I still had the receipt, and as it turns out, I still had it 5 years later.

Since there is a life time warranty on the Gempro, they refunded my money. It's a junk scale, but a classy company.

If you don't have one, don't get one.

 

[pirate ammo]

I had a Gempro 250. As with most all strain guage scales, it was a drifter. I put it away after a while and got and A&D. Funny thing thing though, I contacted the Gempro factory and told them about the drifting. They asked if I still had the receipt, and as it turns out, I still had it 5 years later.

Since there is a life time warranty on the Gempro, they refunded my money. It's a junk scale, but a classy company.

If you don't have one, don't get one.

the 250 is no longer made thats why I thought about the 300,,how's the A&D working out, I just don't need a 5 or 6 hundred dollar right now.

 

[Kracken McGraw]

You might check out the bald eagle scale from Grizzly. It goes down to hundredths like the GemPro at about a third of the price.
@SPJ has one, maybe he will give a review.

 

[Turbulent Turtle]

the 250 is no longer made thats why I thought about the 300,,how's the A&D working out, I just don't need a 5 or 6 hundred dollar right now.

The A&D fx120 is a magnetic force restoration scale and not a strain scale. As such, the A&D never drifts. Of course, it is quite sensitive to air currents and other such things.

Yes, it's quite expensive compared to a Gempro. That's the difference between strain scales and magnetic force restoration scales.

 

[argh]

Like turbulent turtle i had a gempro 250 that went south (drifted rapidly). A few years later i claimed it under warranty and got the 300 replacement.
For a reloading scale its not what you want. Mine does not drift ONCE it warms up, but it cannot resolve small changes in powder such as trickling up to weight.
I have some real cheap scales that do resolve single kernel changes, so i primarily use them and then check weigh on the gempro.
The gem pro does weight all check weight consistently to the .02 of a grain, so i would have to ay its accurate, but not a powder reloading scale as it doesnt see minor weight changes required for trickling powder charges.
JMO
Adrian

 

[T-shooter]

For the money it's reasonable. You need to take care in how you use it to get the best results. Here is an older post with test results. It will almost always read +/- .02 grains with more being correct. It will run off batteries if you have problems with your electric being clean.
http://forum.accurateshooter.com/threads/digital-scale.3941692/#post-37117953

 

[JLT]

I have a GemPro 250 ( basically the same thing as the 300) and I've kept it as a back-up, just in case my A&D gets to feeling poorly. I've weighed them side by side after calibrating both scales and they're so close to each other that I guarantee you will never, ever, ever shoot the difference. Because the GemPro is a strain gauge scale, trickling up to the desired charge weight requires a different approach. One needs to trickle a bit and perturb the scale - best done by taking your tweezers and pushing down gently on the pan - and let the scale settle on the new weight. This takes some time when compared to the A&D, but it will yield accurate charge weights. I got pretty good at counting the kernels coming out of my trickler when I used the GemPro as my primary scale.

The A&D is much quicker but, if used properly, the GemPro delivers perfectly acceptable precision.

My opinion. Worth exactly what you paid for it .....

 

[pirate ammo]

Can’t complain, it matches my Parker beam scale but it will drift slightly when the wife walks by.
I blame her of course.
Jim

Jim,how does it do on lite loads like 2.9 gr.,,we're loading for PPC competition.

 

[pirate ammo]

making me a list.I loaded 2000 rd. 38 spc. wadcutters using a Lyman Microtouch 1500.My friend did good at Raton last week,but we to get a better scale that's why I'm
asking questions.I guess 3rd in somethings are good.

 

[Nature Boy]

I have a GemPro 250 ( basically the same thing as the 300) and I've kept it as a back-up, just in case my A&D gets to feeling poorly. I've weighed them side by side after calibrating both scales and they're so close to each other that I guarantee you will never, ever, ever shoot the difference. Because the GemPro is a strain gauge scale, trickling up to the desired charge weight requires a different approach. One needs to trickle a bit and perturb the scale - best done by taking your tweezers and pushing down gently on the pan - and let the scale settle on the new weight. This takes some time when compared to the A&D, but it will yield accurate charge weights. I got pretty good at counting the kernels coming out of my trickler when I used the GemPro as my primary scale.

The A&D is much quicker but, if used properly, the GemPro delivers perfectly acceptable precision.

My opinion. Worth exactly what you paid for it .....

After I got my A&D I checked 10 charges on both scales and they agreed 10 out of 10.

When I was using the 250 I followed a similar process by unsettling the pan to get it to register the change in weight.

Never had a drifting issue. Mine was a good scale and a good value. If the 300 is similar in performance then it could be a good option until you’re ready to step up to an A&D

 

[ej3rd]

I used the GemPro 250 a lot. Mine was a drifter. Once I learned how to use it I was able to deal with the latency and other quirks. I finally went with the Sartorius 64 with the AutoTrickler. Expensive but well worth it.

 

[LGKLAS]

I've owned both. 300 and 250. I first owned the 300. I found it real slow and too tall for my frankfort trickler. So, sent it back and got the 250 which is much faster. Company had no problem in refunding/replacing. Good service. The 250 is now discontinued. I believe both weigh accurately just the 300 was slower. Like that they weight to the 0.0X gns.

I need another scale and am going to try the Grizzly Bald Eagle, mentioned here (thanx). lg

 

[D Coots]

If you're using batteries, they last much longer in the 300.

 

[pirate ammo]

I need another scale and am going to try the Grizzly Bald Eagle, mentioned here (thanx). lg

got mine today,going to start working with it this weekend.

 

[D-4297]

I've had a Gem-Pro 250 for nearly two years now , and it has served me extremely good . Like many things in life , One must follow the instructions provided with the device . It is set up in a room with the A.C / heat duct closed off , with room temp about 80-F ambient , and it stays plugged in 24-7 / 365 . Unless I'm gone for a Match . And I never use it until it has been plugged-in for at least 24 hrs . I did install two of the line filters on the cord , and it is plugged into a line filtered computer bar , ( my term ) . I've checked it against several different , much more expensive scales , and it is never more than a tenth off . Would I like to have a ADi , or a Sartorius ? Of course I would . But I could afford this at the time , and it was a up-grade .

 

[cw308]

I've been using the GemPro 250 for my benchrest loads , it's very accurate , drifting because it's so delicate sound as the grains hit the pan will cause it to drift , all I do after the powder drops is slightly raise the pan and lower it back on the scale and it's nuts on . I wouldn't hesitate to use the 300 for accurate loads . When throughing a charge I can get a accurate 40.80gr. of IMR 4064 or 40.82 if I want . Not made for the heavy handed .

 

[T-shooter]

When using the GemPro-300, always set the pan down like a feather. If not, the readings will probably be off. Also the best way to trickle is to add powder, then reset the pan on the weighing platform again. When you zero the empty pan, not the negative reading when you lift it off. The reading should be the same after weighing a load and removing the pan. I had 2 GemPro-300's for testing. One seemed to be more accurate zeroing the reading TARE after each load, with the other one, it didn't seem to matter. When in doubt, reweigh the load. With care I could almost always weight within .04 grain. Here are a couple more test I did with the 300. Weighing the same weight 25 times resetting TARE each time.


Weighing several things 15 times each without resetting. The most in each category is highlighted in green, others in blue.

 

[Rich S]

I havent used the Gempro but have a Tree HRB 105. It is also a strain gage type scale. Mine does not drift much if it is warmed up an hour before using. It is very responsive to powder drops. It picks up single Kernals (0.02 gn) as fast as the fx120 or my Metler AM50. The Metler AM50 is a force balance similar to the fx. The Tree perfomed nearly as well when I compared them. For a budget balance the Tree HRB seems to be a good option. I picked mine up used on ebay fairly cheap.