210g Golddot -- 50g Blackhorn

[ronlaughlin]

The 210g Golddot got a look this morning.

The distance from the muzzle to the horse is 25 yard. The powder charge is 50 grain Blackhorn (37.5g weight).

 

[Semisane]

Neat Ron. It looks as though it was on the cusp of opening up into the typical gold dot flower. Do you have any guess as to what the muzzle velocity would be with that load?

I've shot the 210 grain .410 Gold Dots designed for the .41 Mag out of my .45 Renegade with 75 grains of GOEX FFFg and got an average velocity of 1584 fps. But they were hard loading in the sabots I had.

The 210 grain .41's opened up beautifully at that velocity the moist sandy loam behind my 50 yard target.

 

[ronlaughlin]

Neat Ron. It looks as though it was on the cusp of opening up into the typical gold dot flower. Do you have any guess as to what the muzzle velocity would be with that load?........

My guess is, your guess is, better than my guess is. Wonder what your guess is?

 

[Semisane]

My guess is the 50 grain load produced something less than 1400 fps at the muzzle.

I've only ever bought one canister of Blackhorn, and that was about eight years ago. I used it up in my Omega X7 shooting 300 grain Hornady SST's and 250 grain .452 Deep Curls.

Eighty grains under the SST's was right around 1550 fps. Eighty grains under the Deep Curls (50 grains lighter than the SST's) was right around 1600 fps. So I would extrapolate that 80 grains under a 200 grain bullet (another 50 grains lighter) would be something around 1650.

It might be reasonable to assume the velocity with a 50 grain charge under a 200 grain bullet would be way less than the 1650 fps produced by the 80 grain charge. Perhaps in the range of 1000 to 1200 fps (the assumption being a 40% reduction in powder would yield a 40% reduction in velocity). But I doubt the velocity change would be quite so linear. Plus, that's in a 50 caliber. It would certainly be different in a .45. How much different? I have no idea.

Maybe someone can chip in with velocity data for Blackhorn in a .45.

 

[ronlaughlin]

My guess is the 50 grain load produced something less than 1400 fps at the muzzle..........

So out 25 yard bullet speed maybe.........1320? Your guess is certainly better than mine. It seems the capture system is flawed. The handgun bullet should work better than just being on the cusp, at handgun speeds. However, i do recall from years ago, when killing excess deer in February, using a 44 revolver, none of the dead deer killed by factory bullets indicated any expansion at all, when examining their lungs etc, and the deer ran forever.

 

[Idaholewis]

Ron, Your 50 Grain tests have showed me that I’m not missing anything with the Fancy Bullets. This Pistol bullet should have opened up? Velocity would have been neat to know on this one

 

[52Bore]

With that large of HP, I'm surprised as well..
Guess a 'self defense' bullet is what it implies and not anything of any distance.

 

[52Bore]

That bullet looks nearly identical to the Speer - 275gr Deep Curl that was tested.
Same result.

Yet the 250 Speer Deep Curl performed perfect.
Go figure??

 

[ronlaughlin]

The hollow in the 210 grain bullet is quite shallow compared to the hollow in the other two bullet.

 

[52Bore]

The hollow in the 210 grain bullet is quite shallow compared to the hollow in the other two bullet.

One would think the name of the bullet would define its characteristics. i.e. all Gold Dot look/made the same except the weight.
This 210 Gold Dot looks and performed the same as the 275 Deep Curl - poor.



Thanks