2 Questions On 10 mm Brass

[The Earl o Sammich]

Question #1.  10mm Mag.  Can it be trimmed to 10 mm Auto?  I have access to a limited supply for free.

Question #2.  Starline brass has a minimum order of 8,000 cases for nickel plated 10mm Auto at 169.6 per thousand.  That would be $1356 total.  I don't know if that includes shipping or not.  Probably not.  Would anyone be interested in doing a group purchase?  I would be in for 2k.

[sqlbullet]

Mixed reviews on 10mm mag trimmed.  Some have done it and report it is fine, others have seen excessively thick brass at the case mouth.  Also, case capacity may be reduced if the head is thicker.  If it is free, get some, trim it and check the wall thickness and volume.

I am sure you could find guys here who would be in for a group buy.  I personally still have about 1500 new unfired plus about 1500 in reloading rotation.  But I don't think it would be any trick at all to find 8 guys who want 1000 around here.

[DM1906]

The 10mm Magnum brass can be trimmed and used for 10mm Auto, but there are some caveats.  The case wall is thicker at the mouth after trimming (the case wall thickness is tapered).  This only presents a problem with tight chambers.  For example, I can use them as-is in the OEM Glock barrel, but they are too tight in any of my aftermarket barrels (once a bullet is seated).  Case capacity volume will be slightly reduced, for the same reason.  If you can work within these conditions, the brass is fine.

That said, once you take the case capacity into consideration, the case mouth to about where the bullet base will seat can be "polished" down to an acceptable size (adjust your load recipe to accommodate it, if you're loading to near max pressure, otherwise I don't).  It doesn't take much (.001-.002") to fit them.  If you're only using an OEM Glock barrel, or other sloppy chamber, this may not be necessary at all.  I use a Lee case trimmer case holder, cordless drill, and some 1200 grit wet/dry sand paper, with a .401 bullet seated (this also allows for extra room when using .400 bullets).  Some careful measuring and the brass is reliably serviceable.  Before you can use a "Lee" type case trimmer, you MUST seat a bullet, remove it, then trim to length.  My process:  Cut cases to 1.00", deburr, seat bullet (I use a .401" 175 gr. TC hard cast, seated to 1.240", which allows for longer bullets later, the case will bulge, making it very easy to see the bullet base depth), polish to diameter, remove bullet, trim to length, deburr.  Done.

[DM1906]

Also, I would be interested in the bulk buy of Starline nickel brass.  I prefer nickel, and use it almost exclusively for 10mm.  You'll have to contact Starline, but I don't think freight would be included.  I could be wrong.  If you buy 3 drums, you get a bulk discount, as well.  Someone will have to take the order, count the pieces, package them and ship them out (perhaps a 2nd shipping cost).  Or, keep an eye on Midway, as they routinely have Starline nickel brass available.  Compare your final cost with theirs.  Their current posted price is $189.99/1000 plus shipping, but it's out of stock now, of course.  It may not be worth the effort.

[475/480]

If we could get a bulk buy of Starline Nickel brass together I could run it BUT I just spoke to Jenny at Starline and she said it is 6-8 months out for (1) -8000pc order of 10MM nickel brass. And a larger quantity would NOT change lead time unless we ordered about 200,000 pcs. 

**I spoke to Starline again the 6-8 months is for BRASS cases not nickel cases.
3 months for 1 drum (8000 pcs) of nickel brass.I bit the bullet and placed an order
Shipping is included in that price.

Sean

[The_Shadow]

Now that Underwood has his own named brass, I wonder if he'd be selling some in the near future?   

[DM1906]

Now that Underwood has his own named brass, I wonder if he'd be selling some in the near future?   

Double Tap does, so why not?  However, DT isn't shipping any, although they say "in stock, ready to ship".  I have a "pending" order, 4 months now, to be canceled today, never again to be ordered.  DT brass is excellent, but not worth the crappy service.  Sad, but that's the way it is.  I use their 10mm nickel brass for 9x25D, which seems to size and hold up better than any other, including dedicated 9x25 brass.  Not one case failure yet, while the others have been about 50/50.

[The_Shadow]

I use their 10mm nickel brass for 9x25D, which seems to size and hold up better than any other, including dedicated 9x25 brass.

I have been holding off to see if Underwood will be getting properly headstamped 9x25D brass...I would consider getting some of his loaded ammo or even brass if he were to sell it.

I am quite surprised no one has asked Kevin if he would sell the brass...only. 

[DM1906]

I use their 10mm nickel brass for 9x25D, which seems to size and hold up better than any other, including dedicated 9x25 brass.

I have been holding off to see if Underwood will be getting properly headstamped 9x25D brass...I would consider getting some of his loaded ammo or even brass if he were to sell it.

I am quite surprised no one has asked Kevin if he would sell the brass...only. 

I have better "luck" with 10mm brass I size myself.  I control the shoulder spacing, which is much more consistent than new or once fired 9x25 brass.  I use a Lee .357 Sig die, which seems to do a lot better than a friends high-dollar Dillon 9x25 die.  I have some brass that's been reloaded 6-8 times, still perfect, while my friend's experience has been 2-3 before they either split the mouth, or separate at the shoulder (during sizing).  Loads, bullets and barrels are essentially the same.  I don't know if it's the die or the brass, but what I'm doing works.  No powder-puff rounds, either.

[The Earl o Sammich]

If we could get a bulk buy of Starline Nickel brass together I could run it BUT I just spoke to Jenny at Starline and she said it is 6-8 months out for (1) -8000pc order of 10MM nickel brass. And a larger quantity would NOT change lead time unless we ordered about 200,000 pcs. 

**I spoke to Starline again the 6-8 months is for BRASS cases not nickel cases.
3 months for 1 drum (8000 pcs) of nickel brass.I bit the bullet and placed an order
Shipping is included in that price.

Sean

You want to get rid of a couple thousand of those?

[475/480]

Sounds good , email answered.
I will keep 3-4k and sell the rest .

Sean

If we could get a bulk buy of Starline Nickel brass together I could run it BUT I just spoke to Jenny at Starline and she said it is 6-8 months out for (1) -8000pc order of 10MM nickel brass. And a larger quantity would NOT change lead time unless we ordered about 200,000 pcs. 

**I spoke to Starline again the 6-8 months is for BRASS cases not nickel cases.
3 months for 1 drum (8000 pcs) of nickel brass.I bit the bullet and placed an order
Shipping is included in that price.

Sean

You want to get rid of a couple thousand of those?