Speer 125gr. Hollow Point Flat Base Bullets

[Bull 228]

Howdy,
Anyone have any experience with loading up these Speer 125gr. HP in the 300 Whisper/Fireball/Blackout platform? I just turned up a box of these bullets on my bench and thought they might have some potential. (Supersonic loads)
NT

[i8asquirrel]

I use them over 18.0 gr 4227 with cci400 primers and have had very good luck:grin:

[Bull 228]

They look like they would be a great hunting bullet in the caliber, maybe better for varmints...not sure if the bullets are designed to hold together very well or not. thanks for the input.
NT

[i8asquirrel]

well I can tell ya that out of my .308 win with a 16" barrel they knock blacktail deer here in Oregon on their ass. put one in the boiler room and get a DRT kill on two different bucks. loads of trama and no exit.:smile:

[Bull 228]

Thanks for the info, that was my feeling that it would be pretty devastating. Like to try it out on a coyote and check the results. Thanks again.
NT

[alorton]

There is a 300 AAC Blackout thread on here that rsilvers posted that had ballistic gel testing and the 125gr Speer TNT was one of the tested bullets if you are looking for hard data on terminal performance.

It performed ok but had a long neck length at 300 BLK velocities. Not sure if that would change with faster rounds like .308 as I haven't seen testing but I suspect it would.

[K9 Handler]

There is a 300 AAC Blackout thread on here that rsilvers posted that had ballistic gel testing and the 125gr Speer TNT was one of the tested bullets if you are looking for hard data on terminal performance.

It performed ok but had a long neck length at 300 BLK velocities. Not sure if that would change with faster rounds like .308 as I haven't seen testing but I suspect it would.

I think we're talking apples and oranges here. The Speer 125 hollow point looks like a hollow point pistol bullet. The TNT is a different animal altogether (made for different animals altogether!).

[Bull 228]

The bullet box reads:
Speer
125 grain
Hollow Point
TNT

and it has a flat base. Not sure if there is some confusion or not.
NT

[alorton]

The bullet box reads:
Speer
125 grain
Hollow Point
TNT

and it has a flat base. Not sure if there is some confusion or not.
NT

Yep, that would be the same 125gr TNT that Bressfetcher gel tested for AAC at 300 BLK velocities. One of the neat things about "varmint" bullets in the Whisper/BLK is that they are designed to fragment explosively at typical .308 velocities but slow them down to Whisper velocities and they perform more like hunting bullets do in the .308. The 125gr TNT performed ok in the tests, it just didn't open up quite fast enough for my tastes. The Hornady 110gr V-Max, the Barnes 110gr TSX, and the Remington 125gr plastic tip performed the best as far as I could tell.

[K9 Handler]

My bad. I was thinking "Sierra", not "Speer".
The Sierra 125 g. 30-30 Pro Hunters are the ones that look like pistol bullets.

Sorry for the confusion.

[alorton]

The Sierra 30-30 bullets should perform well at Whisper velocities as they are designed with a lower velocity threshold in mind. The trouble is they usually won't feed well in an AR.

[rsilvers]

Yep, that would be the same 125gr TNT that Bressfetcher gel tested for AAC at 300 BLK velocities. One of the neat things about "varmint" bullets in the Whisper/BLK is that they

Brassfetcher did not test anything at BLK velocities. The ammo was downloaded to simulate an 80 yard impact.