7 PRC and 155 Gr terminal ascent testing

Korhil78 · Dec 26, 2025

Went out and tested the 155 Gr terminal ascent bullet in my 7 PRC this afternoon. Got to 71.5 Gr before it started showing pressure signs. 71 grains shows real promise. Like a dumby, I forgot my chronograph so I don't know how fast it's going but I'll load some more 71 Gr and see.

Jumpalot · Dec 26, 2025

What powder? How far off the lands?

ammodrew · Dec 26, 2025

7PRC is in my near future, just haven't worked out the timing yet.

Korhil78 · Dec 26, 2025

Haha…I forgot all about putting the powder in there. I'm getting old!

Powder: Ramshot Grand
Primer: CCI BR2
Case: Petersen
Bullet: 155 Gr Terminal ascent.

.050" off the rifling.

Jumpalot · Dec 26, 2025

Thanks...I'm going to try the 155 TA w/H1000. I'll be interested to hear what speeds you're getting.

Korhil78 · Dec 26, 2025

I have H1000 as well and was curious about it but wanted to try the Ramshot Grand. They are pretty much the same powder haha. I'll chrono them on Monday or Tuesday.

hseII · Dec 26, 2025

I had one chambered in October.

First 6 shots on paper: Hornady 180 ELDM box ammo.

I like the 7mm PRC.

Jumpalot · Dec 27, 2025

I'm struggling to try switching. I have a load with the 175 Bergers that shoots stupid good out to 1000. But like the idea of the TAs and want to see how they work on game.

Korhil78 · Dec 27, 2025

Sir, I feel that I need to tell you that I have very accurate loads for my rifles that I love. But everytime a new bullet comes out, I just HAVE to try it. It's a dumb obsession and there are plenty of seats still available. Come join me.

Hydra6 · Dec 27, 2025

I got some 155 TAs to try, probably try H1000 first. Watching this thead!

Korhil78 · Dec 27, 2025

I went out and shot three of them to see what the velocity would be. This is with 71 Gr of Ramshot Grand

3130
3131
3135

Jumpalot · Dec 27, 2025

Looks like you're done!

Starbuck · Dec 27, 2025

.586 BC with the twist and COAL of most 7 PRC's?

TA's must really be something on game?

Korhil78 · Dec 27, 2025

Starbuck said:
.586 BC with the twist and COAL of most 7 PRC's?

TA's must really be something on game?

I'm just having fun. My limit on game is out to 800 yards and that's only if it's not windy. If it is, I just try to get closer. I don't worry about BC too much unless it's just atrocious. I know people worry about BC a lot and those people shooting game out to 1000 yards or more definitely need to.

I can tell you that the federal TLR bullet was really really good on game if you like bonded bullets. It's the same design on the interior of the bullet as the terminal ascent.

7 PRC and 155 Gr terminal ascent testing

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