difference in grains

[pdq_wizzard]

when I reload my pistol rounds, I charged 10% less than the max that the Powder manufacture recommended. That could be .5 to .7 grain, depending on the caliper.
So if you, loaded .4 grain less than max you will fine.
Most important in your case, you want to have enough powder to push the bullet all the way down the barrel. You don't want it to get stuck half way when you fire the second round.

If you want you can test it out, load a few round in the same amount of powder you think you got. Than go to the range and test them out. Fire them at a very close target, just to make sure they reach the target, if all made through your gun, you are good. Take extra precaution.

If it's a 9mm there is a 99% chance that it is an auto, in which case it would not cycle a squib load.

[aznpg]

yeah gonna go to the range right now to test out the first 50 rounds i made to see if anything goes wrong i'll post up the results when i come home. given if the gun doesn't blow up which shouldn't since i did not go over the max load recommendation. wish me luck

[aznpg]

well just got back from the range and dinner. and to my surprise all the ammo fire without any problem and i actually had a better grouping this time around too compared to when i was firing walmart federal 9mm

[Bill Steele]

When you say it is .4 gr off. Are you saying it varies as much a .4gr from charge to charge, or it is off from what the Lee data says it should be?

[pdq_wizzard]

well just got back from the range and dinner. and to my surprise all the ammo fire without any problem and i actually had a better grouping this time around too compared to when i was firing walmart federal 9mm

yep, now you have the sickness nothing like chasing "the" load

[aznpg]

When you say it is .4 gr off. Are you saying it varies as much a .4gr from charge to charge, or it is off from what the Lee data says it should be?

it varies as much as .4gr from charge to charge

[pdq_wizzard]

it varies as much as .4gr from charge to charge

Wow! it should not be doing that, when I set up I drop 5 to 10 drops before I start loading and they are all within .1 or less.

I would make sure you are being very constant with the motion you use to drop the powder. (same movement, speed and pressure)

[Bill Steele]

The Auto Disk is normally very accurate.

it varies as much as .4gr from charge to charge

Something is very wrong.

I use the Lee Auto Disk (the one below the Pro Auto Disk, quality wise). It never varies more than .1gr and usually is spot on charge to charge over hundreds of drops. This is with a number of different powders of widely varying density and granularity.

One thing to check is to make sure the disk is cycling all the way back under the hopper each time. I found on my AD that with some powders with flat flakes the disk would tend to hang up.

Also, you might want to make sure your chain is adjusted so it is pulling the disk all the way back under the hopper as your handle is returned to upright.

I would also give Lee a call and ask them what else might be happening.

[Anti-Hero]

A +/- .4 gn variance is unacceptable.

[SixPointEight]

A +/- .4 gn variance is unacceptable.

I think he means +/-.2gr

I certainly hope so

[stphnman20]

It also depends on the powder.

My Lee throws consistent with H335 all day long. But other powder such as Varget and RL15, it throws anywhere from .2-.5gr.

[Revoman]

If you're using a digi scale, are you letting it warm up first? Most need some time to gather their wits, some up to 30 minutes or so.

Have you calibrated your scale to assure that it is reading correctly?

Just a thought.

That much of a swing is not a good thing.

[Brasspolisher]

Had something similar happen with my first loads using a brand new Autodisk. Turned out the problem was a blob of grease partially coating the inside of the drop tube -- the charges would meter erratically (all light) because some of the powder was sticking to the grease and not making it into the case. Worked fine after disassembly and a few shots of carb cleaner. (There's no need to grease or oil the measure during reassembly.) I now have several of 'em and that was the only one that ever had the problem -- or any evidence of lube whatsoever.

Just a thought, hope it helps!