200 grain Gold Dots and 200 grain HSTs

[choo2x]

I bought these bullets in September from Tom (Bang For Your Buck) on Gun Broker.

https://www.gunbroker.com/All/search?IncludeSellers=2201491

He was nice enough to package 250 each of both the 200 grain Gold Dots and the 200 grain HSTs in one small flat rate USPS box and keep the balance of both batches for himself.  I measured the bullets and observed the following:

Gold Dots         HSTs   
Length Weight  Length Weight
0.681   198.0   0.708   199.5
0.683   198.2   0.710   200.4
0.687   199.2   0.708   200.5
0.693   200.8   0.710   200.5
0.695   201.4   0.708   200.3
0.688   200.0   0.709   199.9
0.684   198.4   0.708   200.1
0.686   198.9   0.710   200.2
0.691   199.5   0.709   199.7
0.694   201.1   0.710   200.1
         
0.688   199.6   0.709   200.1   Average

Based upon our experience with the Cutting Edge 190 grain solid copper bullets, we were pretty sure 8.0 grains of CFE Pistol would push both of these into the high 1,100 fps zone.

https://10mm-firearms.com/reloading-10mm-ammo/cutting-edge-190-grain-copper-solid/msg85295/#msg85295

The weights are close and the lengths are similar (0.725 for the Cutting Edge 190 grain solid copper).  We loaded our shortened ladder of 7.5 and 8.0 grains of CFE Pistol using Winchester LPP and new *-* brass to a COAL of 1.255" (I just noticed I didn't include the COAL in the post about the Cutting Edge 190 grain solid copper).

Again, the test pistol was my G20SF with a StormLake 5.3" Ported Barrel.  The average speed we observed was 1,176 fps for the Gold Dots and 1,160 fps for the HSTs.  We're not sure why the Gold Dots went faster than the HSTs.  Maybe because the HSTs weigh 0.5 grains more?    ¯\_(?)_/¯

As always, use this information at your own risk, but the brass and primers both looked good.  We think we'll standardize all three bullets at 8.0 grains of CFE Pistol and leave them there.

Shelton

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[The_Shadow]

The 200 grain Gold Dots being shorter and having a reduced section that has less frictional surface area...
Thanks for you post.  Could you post pics of the bullets you have?

[choo2x]

Per your request.  SC

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[The_Shadow]

Amazed they had these, it looks like these were pulled.  Those are the new style Gold Dots and HST's
Thanks for posting the pics!  Much appreciated! 

[Kenk]

I still have a bunch of the current 200gr Speer Gold dot 10mm's sent to me by Vista Outdoors, the ones Mr Revolverguy tested for us. My hope is to get a chrono soon, otherwise my testing is pretty useless
Thanks

Ken