Which powder would be the best to use for mid to upper power range. I have unique auto comp 800x Aa #2 7 5. Will be using 165 gr. jacketed flat point from xtreme. Lee turret press with a rcbs uniflow powder measure. I have a dw rz 10. Thanks

800X is good, but meters terrible.  AA#7 can deliver some good numbers too.

Seems like I have read that auto-comp is a good powder for 10mm, but I am not familiar with it personally.

Quote from: sqlbullet on April 08 2015 11:41:27 AM MDT
800X is good, but meters terrible.  AA#7 can deliver some good numbers too.

Seems like I have read that auto-comp is a good powder for 10mm, but I am not familiar with it personally.

Of your choices I would look at #5 or #7.

CW

A7. You could easily get in the 1300s, and it meters so reliably that it can safely be metered through the Uniflow, as long as you're at least a skosh under max. I see deviations with A7 from my Uniflows of about 5/100 grain. It is also clean and low flash.

800-X would be the second choice, but it comes with some hassles. Drop and trickle that powder please.

Longshot and it can be found.

Yes it can I scored on 12 pounds of ls a couple weeks ago now if I could find some 2400

Thanks guys will check for longshot Friday its my day off

Which powder unfortunately at this time might have to be settled by who has any in stock.

Thank you Obozo!

Powder valley out the two local shops out have to keep checking with them

brass from starline showed up Wednesday  loaded ten rounds with 11 grs.#7 165 gr.jacketed flatpoint from xtreme hope to go out this coming Friday to check them out also loaded 200 for the .45 and 200 for the .40 s&w got 200 to load for my 9mm then I need to size what I have powder coated

800x is fine to use without weighing/trickling every round, but you have to test your powder measure.  With my Lee autodisk, I set it at 8.6 grains, got some wide variances, but I'd be comfortable mid-range with it.  Statistically, there is a 1 in 10,000 chance of throwing a charge 0.4 grains or higher than average.  That 1-10000 chance is what I set as an acceptable level of risk, and the 0.4 grain was calculated with weighing 200-300 throws, both with constant powder level (throwing the powder back after weighing) and with diminishing powder level.

My other Lee powder measure (Perfect Powder Meadure) cannot be trusted with 800x.  Powder throws do not fit on a Bell Curve, and consistenly throw 1 grain above/below average.

I agree... I use Four different measurers...

The Lyman dosent do well with 800x or flakes in general. The Uniflo works perfectly as does the RCBS rotor powder drop. The Redding 3BR is also no problems.

Dryer sheets and regular old soap and water washes (where applicable) remove all static electricity.

CW

I suspect it may be the personality of the individual measures as well, and their design.  When changing powder measures, throw a hundred and see what the variance is.  If that seems like a lot of work, do it while working up a load that you will be weighing each charge anyways.

got to the range before the rain the 10 shot great not much recoil brass looked fine going to bump it up loaded the .40 and the .45 with 800x I use a lee beam scale and a small hornady digital scale to check weights check with digital first easier to read then I put it on the beam for final check throw 10 measures in a cup weigh the 11th if no change I will start loading I check every 15th round the 800x was consistent loading the .40 and.45 going to load some for the 10

I find like in most things Consistency is tantamount to good shooting...or in this case reliably consistent powder charges.

I use a baffle, I keep the hopper at least 1/2 full and a tap the measure at the bottom of the stroke 3-4 times as if you needed to help powder trickle out.  When I do not do this, I fined FAR less consistency.

CW