Author Topic: 10mm Factory Ammo Master Sheet  (Read 29659 times)


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Re: 10mm Factory Ammo Master Sheet
« Reply #60 on: September 23, 2017, 01:59:47 PM »
Underwood has been using the rebranded LOVEX powders as sold by Shooters World and may have dropped the velocity some, I can see why those with the other powders could be considered discontinued.  However it might be possible Underwood may actually load some lots with those powders again...  We never know what will happen with regards to imported powders.  ???
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Re: 10mm Factory Ammo Master Sheet
« Reply #61 on: September 23, 2017, 02:45:30 PM »
About when did the change occur?


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Re: 10mm Factory Ammo Master Sheet
« Reply #62 on: September 23, 2017, 03:07:14 PM »
What bullet type and weight used those powders?  And what are the differences in velocities for those bullet types/weights with the replacement powders?

I wish we had all the answers.  One thing we know is that what put Underwood on the map was in the beginning he loaded all his 10mm ammo with IMR 800-X powder at max pressures, and possibly beyond, and all velocities from all loads surpassed box flap claims.  It was a hay-day for the 10mm crowd!  But then there was the occasional Case Failure/Ka-BOOM with said ammo, and while it didn't seem Underwood made any changes overnight, IIRC the first thing they did was to add a watered down Colt Delta Elite 10mm load to their lineup (which has since been discontinued) and later over time began experimenting with different powders.

To date we know Underwood has/does use: IMR 800-X, Hodgdon Longshot, Alliant Power Pistol, Ramshot Silhouette, and Lovex D037.1 powders.  I suspect Underwood is now only using Lovex and Silhouette, but don't quote me on that, and most probably (in some cases we know for a fact) lowered velocities across the board (that don't meet all box flap claims anymore).  As an unrelated side note Underwood's prices have gone up over time but are still a relative bargain for 10mm Auto, and they have ceased offering premium bullet loads in 50 round boxes in favor of 20 round boxes while the plinking loads can still be had in 50 round boxes.

What I wish is that I had the money to buy a fresh box of everything in 10mm, from at least all of; Underwood, Double Tap, Buffalo Bore, and others.  Then take it all apart, and see what's what, all at the same time, currently.

I haven't done an exhaustive search related to your questions but you can glean some info hear in Intercooler's Master List at the beginning of this thread and the 10mm Pull Down Data spreadsheet sqlbullet created from The_Shadow's work stickied in the Factory 10mm Ammo pull-downs subforum.  How much is current on YouTube to represent the Lovex powder Underwood is using, I don't know and just don't have time to research the heck out of right now.

No doubt not everything about 10mm ammunition is the same as in some years back that the average 10mm shooter still thinks applies today.  It would be great to compare all fresh and current 10mm loads again now.

I actually have a bunch of the original Underwood 10mm loads from when it was all Nuclear loads of IMR 800-X powder.  8 different ones to be exact. ;D
« Last Edit: September 23, 2017, 03:12:25 PM by REDLINE »
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