A friend came over to load 9mm for his Beretta. Using my Dillon Square Deal B I set it up for his rounds. I set and weighed the powder charge to 4.5gr of IMR 700X which he supplied. To be on the safe side I weighed several rounds to make sure everything was just right. I noticed there seemed to be a dramatic change in quantity of powder dropped every so often. (I had a variances from 3.8 to 5.3 grains) The powder adjustment bolt does not move - I know that for sure. I started looking at the powder and noticed the flat flakes. I'm now wondering if when the machine fills the powder charge bar am I getting the larger charge because they some are laying flat therefore giving me a higher volume and weight? Many years ago I used Accurate #7 and i don't recall having this problem at all. Any suggestions?
Overloads of IMR 700X for 9mm
- Thread starter 358Scout
- Start date
Accurate # 7 is a ball powder and 700X is a flake powder.
Ball powders tend to be more consistent in the charges, especially at the lower settings.
I have a SQ B and have had no problems with the powder measure. I find it very consistent.
One suggestion I would make especially with 700 X would be to make sure that the powder hopper is full or almost full. It helps compact the powder going into the charge bar.
Ball powders tend to be more consistent in the charges, especially at the lower settings.
I have a SQ B and have had no problems with the powder measure. I find it very consistent.
One suggestion I would make especially with 700 X would be to make sure that the powder hopper is full or almost full. It helps compact the powder going into the charge bar.
I've had static problems with 700x as well. I found that if I used a dryer sheet to wipe down the powder hopper or even hang a strip of the sheet in the hopper that static would be reduced.
Brad.
hatman1793
CGN Ultra frequent flyer
Mostly consistent.
All powder measures, whether they be automatic measures or drop em one at a time measures will not be absolutely consistent.
Take the RL550 powder measure. If you set it up to drop 4.0 grains of 700X, it will in fact drop 4.0 most of the time. Since it is a mechanical device and keeping in mind other factors that affect powder drop, this same measure will drop 4.0. It will also drop 3.9, 3.8, sometimes 4.1 and back to 4.0.
The key is to adequately judge the amount of powder you drop to ensure at least the minimum to allow your firearm to function. So, for example, if you are dropping 2.5 grains of PROMO which is a flake powder into a 38special case with a 148 FWC bullet, sooner or later the measure will drop 2.3 or 2.4, but mostly what it is set at. Judging the minimum is a must more-so for auto's than revolvers, but you have to realize that sometimes your measure will drop short.
All powder measures, whether they be automatic measures or drop em one at a time measures will not be absolutely consistent.
Take the RL550 powder measure. If you set it up to drop 4.0 grains of 700X, it will in fact drop 4.0 most of the time. Since it is a mechanical device and keeping in mind other factors that affect powder drop, this same measure will drop 4.0. It will also drop 3.9, 3.8, sometimes 4.1 and back to 4.0.
The key is to adequately judge the amount of powder you drop to ensure at least the minimum to allow your firearm to function. So, for example, if you are dropping 2.5 grains of PROMO which is a flake powder into a 38special case with a 148 FWC bullet, sooner or later the measure will drop 2.3 or 2.4, but mostly what it is set at. Judging the minimum is a must more-so for auto's than revolvers, but you have to realize that sometimes your measure will drop short.
