I have purchase some Underwood 180grn. Bonded (Gold Dot) ammunition.  I would like to replicate it with handloads.  What would you recommend?  I like BE-86 powder, and have some on hand.  Thanks!

Evening Star Child,
According Alliant's load data, top end is 8.2 gr's of BE-86, getting you 1,256 FPS, with Underwood's getting 1,300. This isn't far off from UW, but I'm sure some of the others can get you closer. Lastly, BE-86 is some awesome powder as I'm sure you know!

Ken


10mm Auto   180 gr JHP   Federal   1.25   5   Fed 150   BE-86   8.2   1,256   


https://www.alliantpowder.com/reloaders/recipedetail.aspx?gtypeid=1&weight=180&shellid=30&bulletid=332

Star Child see this link of recent UW ammo may help out
http://10mm-firearms.com/factory-10mm-ammo-pull-downs/underwood-200gr-hornady-xtp-(redline-819)/msg85319/#msg85319

I loaded and tested 8.4 grains of BE-86 under the 200 grain Gold Dots @ 1237 fps

Here's the link to the 180s http://10mm-firearms.com/factory-10mm-ammo-pull-downs/underwood-180gr-bonded-jhp-(redline-819)/

Graybeard the reason I didn't link that one for Star Child is that UW was using LongShot and not BE-86 in that loading...

Quote from: The_Shadow on February 13 2020 09:02:29 AM MST
Graybeard the reason I didn't link that one for Star Child is that UW was using LongShot and not BE-86 in that loading...

I realize that. Just sharing some of your excellent work. Since he has the GD 180s, he might consider obtaining some LongShot. Easier workup since your data is available

Thanks for all the information.  How does Longshot compare with BE-86 ?  I know BE-86 is faster burning, The Hodgon website shows the 10mm 180grn. starting load as 8.5 gr. of Longshot at 1,221fps 31,000PSI and a maximum load of 9.5gr. at 1,287 fps. 34,600 psi.   Do y'all think Longshot might be a better powder for more velocity?  How does it meter? 

If you're chasing speed, I think LongShot is a better choice. I've pretty much replaced 800X with it for hot loads. 9.2 - 9.4grs with 180gr RMR fmj bullets was averaging 1320fps out of a 5" 1911. The extreme spread was only 31fps.

Those were loaded in a progressive press as I was looking for a fairly hot plinker load for my 10mm AR. It meters well enough that I was shooting for 9.3gr and the charges I pulled and weighed were only + or - .1gr and with a 31fps extreme spread, I was happily surprised.

I think Hodgdon's numbers are a bit low, or they used a really sloppy test barrel.

It looks like by Shadows pull down of the Underwood 180 Gold Dot that the cartridge contains approx. 8.7gr. of Longshot.  I should be able to duplicate that round and be safe according to the Hodgon website reloading information.  It might be tough getting the same velocity of the Underwood round with BE-86.  Thanks everyone. 

I chronographed the Underwood 180gr. bonded bullet this morning.  The velocity was @ 1,217 fps.  I should be able to replicate this load with 8.4gr. of BE-86, which I have Chronographed @ 1,204 fps.  Thanks everyone.

What gun and barrel length are you using? Underwood lists 1300fps for their 180 bonded HP.

Quote from: Graybeard on February 14 2020 10:14:13 AM MST
What gun and barrel length are you using? Underwood lists 1300fps for their 180 bonded HP.

I am using a stock Glock G20 gen4 with a 4.6" barrel.  It was about 36 degrees and I was using the Oehler proof chronograph (model 35P) with three Skyscreens III.  There was no indication of error, my chronograph is about 20 years old but seems to be working fine.  I heard that Underwood (internet rumor) is loading the 180gr. down for better performance.  On the Underwood box it did state 1300fps.

https://oehler-research.com

I received a few  boxes this week for UW, and also said 1,300 FPS

Underwood changed the stated velocity of their 180s from 1350 to 1300 awhile ago. I'm a little surprised they only came in at 1217 out of your G20. That's a little disappointing, although easy to replicate with BE-86. So I guess it's a win

The Underwood ammo with a velocity at 1,217fps. is still a very potent round.  The bullet may even perform better at this velocity than at 1,300fps.?