In the recent course of pumping out several hundred rounds of .223 reloads, I was wondering how effective carefully loaded cartridges of 75 grain HPBT would stack up against the domestic US standard (mostly) of 75 gr. Hornady TAP often used in LE Patrol Rifle or SWAT/Entry Team applications.  To the best of my knowledge, Hornady uses mil spec (I've seen Lake City and Frontier) brass, an unknown type/amount of propellant, and 75 gr. Hornady HPBT bullets.

I have alot of mil spec cases to burn, and I always run my cartridges through a crimping die.  Hornady advertises their muzzle velocities, but as far as I know not the propellant.  I use both H322 and Ramshot X-Terminator powders, but am wondering what others use to mimic the ballistics of this load, along with any thoughts on whether this is viable, shining examples, cautionary tales, et al.

Original Post

Try 24.5 to 25 grains of TAC or Varget to get you 5.56 mm velocities with good accuracy per Western's .pdf data book and Hodgdon's on-line data.

I shot a lot of Hornady 75s, especially back in the day when my Uncle bought it for us, or when I bought bullets at Camp Perry (being $2 cheaper per hundred than Sierra 77s). 

My beef with Hornady's quality control comes from buying bullets in 500-round bulk sleeves or 6000-bullet boxes.  Once you've shot up 500 and go to the next sleeve you need to check where the ogive and bullet length are for the next 500.  Annoying. 

Sierras and Bergers stay at the same seating die length-depth setting forever.

Sinister posted:
My beef with Hornady's quality control comes from buying bullets in 500-round bulk sleeves or 6000-bullet boxes.  Once you've shot up 500 and go to the next sleeve you need to check where the ogive and bullet length are for the next 500.  Annoying. 

Sierras and Bergers stay at the same seating die length-depth setting forever.

 
 

Thanks for the info, Sinister 

The Hornady bullet issues sound similar to what I've experienced in lighter weight .224 bullets or bullets they've produced in other calibers.  

I think we have mentioned it here as well, but I would get occasional flyers that were not me with the 75gr bthp from hornady.  These bullets always seem to do better for me on the hotter side of things too.

I worked some using ARcomp and was happy with the results though a bit over book max charge weights for propellants.

From several years ago, I seem to remember Molon or someone else pretty tuned in to this saying that 77gr Nosler CC is very close to the performance you get from 75gr TAP T2, in reference to terminal ballistics.

Anyone else remember seeing any ballistic data on this?

Joined: 6/11/13
Location: Texas

When TAP 75s first started gaining, I put some in a bid but received the .223 Match, no cannelure on the bullet, rather than the T2. Shots on whitetail and Fackler boxes, zero coolness.

Hornady lists 2 separate 75gr BTHP products, w/cannelure and none, in their component line up so that may be a fine point if you're wanting the T2 performance.

Condition Yellow: For a Longer, Happier Life

75 BTHP

22.5 Ramshot TAC

2.265 OAL

Many moons ago, friends and I worked this up due to the cost of the 75gr TAP FPD (black box).  This load shared the zero with 75gr TAP out of my 16" BCM.  Killed more than a few hogs in TX with both this and the factory load.  Tried from 22.0 to 23.5gr but 22.5 grouped the best. 

 

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