10mm trouble

[jbarrain]

FORUM BOSS: This is an unsafe load. Halt and pull brass.

Always start with low recommended load from proper load manual and check multiple manuals as possible.

Suggest you get a mentor to assist with process.

Banning jbarrain because I don't want idiots on this Forum.

So i just reloaded 50 180 gr. fmj with 15.5 grains of AA#9 now im reading that that is too much powder. also im having trouble with my seating die and my bullet leaghths are all over the place anyway im nervous to shoot any of these rounds cause i dont want to blow my own hand off. Im shooting with a 10mm springfield xd with a 5.25 inch barrel. any advice for the newby

 

[noylj]

Tear them all down. Start at start load. Make up two inert dummy rounds to find/verify the COL that feeds and chambers.
Don't rush. Don't take short cuts.

 

[Schandler]

Buy an inertia bullet puller and drop bullet and powder and start over. It took me several to get dies set up and measure right but once you do - you can go to town. Good thing you caught mistake before pulling trigger

 

[Howland]

Hornady X shows 14.9 grains AA#9 is the maximum.

Great variations in seating depth can be due to the seating die trying to seat the bullet and crimp the case neck at the same time. I've not had much luck doing both. I have always backed the die out to avoid crimping while I seat, then screw the die down but back the seating stem out for a taper crimp that removes the bell. It's an extra step and adjustment but it works well.

 

[BDman]

15.5 would be a mighty full case so, bullet seating would be inconsistent. Did you use the wrong data? I've never seen anything over 15 with any powder in the 10. Attention to detail, especially in reloading, is paramount. Double check those manuals. Good thing you caught it.
Edit: I bet you were looking at the 155gr data - better late than never.

 

[ppaul]

Yup, I think you are a little on the warm side. Checking my notes I have 14.9 grs of #9 with a 180 gr XTP. That load was safe in my pistol with Starline brass and a CCI large pistol primer, over all length of 1.255. Work up to it of course! Do yourself a favor and get a seperate taper crimp die and measure the crimp on a factory round and copy that.
On a unrelated note I see you are from Homer, beautiful country, was ther 50 years ago. Should have stayed! Take care and good shooting!

Paul

 

[joshb]

You need to pull those rounds apart. I have to ask where you got your original load data. Do you own a good manual or are you just pulling data off the internet?
Reloading can be a fun hobby, BUT it can also be very dangerous if you aren’t cautious.
Loading for pistols needs to be done with a little more care because you’re using small amounts of fast burning powders. Slight deviations in charge weight can have drastic consequences. You can easily blow your gun up and lose a finger or two if you’re not careful.
My Hornady book shows a MAX load 14.9 grains of AA#9 for a 180 grain bullet.
Do NOT shoot them!

 

[watercam]

Buy a separate crimping die. You will save time in the end and have more consistent rounds.

 

[rogn]

Use a kinetic bullet puller and pull those loads down. Be cautious with data from some manuals, Hornady has at one time or other published data that was overly optimistic. The 14.9gr load should be approached due to batch/lot variance in burn rates.
The load you were trying to build probably has the powder column so high that the bullet is compressing it, and it often expands and pushes the bullet back out of the case.

There is a website 10mm-firearms.com that has the all the world's knowledge about the 10mm auto at your fingertips. I strongly recommend you spend some time perusing the information, experience and data shared there.

 

[M-61]

So i just reloaded 50 180 gr. fmj with 15.5 grains of AA#9 now im reading that that is too much powder.

My thought is what had you read that led you to 15.5 grains?
Reloading is a great hobby but as with many things (and more so than most) it requires care and extensive understanding as to what you are dealing with. An error can cause a catastrophic injury. A poorly hit golf ball may cause a momentary spike in blood pressure.
Big difference.

 

[deshultz1]

Slow down, disassemble all of those loads and take a brief break before starting to load again. Your gun, your fingers, your eyes, and your life could be at risk.
Reloading is not dangerous, in and of itself, however, it does demand respect for the physics involved. Be careful and make it fun.

 

[Coyotefurharvester]

Do not roll crimp your 10 ammo, use a taper crimp.