+P Throats

[WKR]

Anyone have experience or own a +p throated chamber?
What was your experience? Does it effect anything besides speed?
Does it change barrel life or have an effect on accuracy?
I'm thinking of doing a +P on a 25 creedmoor and want to hear from a few people who have done it to their rifles before I go down the rabbit hole.

 

[WKR]

Anyone?

 

[gabenzeke]

@Ryan Avery

Sent from my Pixel 6 Pro using Tapatalk

 

[Ryan Avery]

Anyone have experience or own a +p throated chamber?
What was your experience? Does it effect anything besides speed?
Does it change barrel life or have an effect on accuracy?
I'm thinking of doing a +P on a 25 creedmoor and want to hear from a few people who have done it to their rifles before I go down the rabbit hole.

I've had lots of +P chamberings. 6UM, 6.5 PRC, 30 Nolser, a couple of 300 RUMs, 300 Terminator, 338 terminator, 338 EDGE

Yes, it affects barrel life, your burning more powder.

Accuracy has been great with mine except for one but I would blame the barrel not the chambering.

 

[NSI]

Does the +P chamber have any effect if you are running factory ammo?

-J

 

[bmart2622]

Im no expert but its my understanding that in order to get anything from the +P you need to be able to increase your powder charge, so if you're limited to factory ammo it wouldn't be worth doing

 

[Tullis94]

Does the +P chamber have any effect if you are running factory ammo?

-J

It will make the velocity slower. You have to hand load if you +P because it takes more powder to get back up to normal pressures.

 

[WKR]

I've had lots of +P chamberings. 6UM, 6.5 PRC, 30 Nolser, a couple of 300 RUMs, 300 Terminator, 338 terminator, 338 EDGE

Yes, it affects barrel life, your burning more powder.

Accuracy has been great with mine except for one but I would blame the barrel not the chambering.

What was your average velocity gains? On the 6UM, 6.5, and 30 nosler?

 

[Ryan Avery]

The 6.5 PRC added 95 FPS over the standard throat.

The 30 Nosler shot a 215 Berger at 3020 with a 22” barrel.

Too early to tell on the 6UM. I’ve only had it a week.

 

[Alex Genereux]

To maximize the +p you have to increase powder capacity which will cause more heat which will decrease barrel life.

 

[willfrye027]

Anyone have experience or own a +p throated chamber?
What was your experience? Does it effect anything besides speed?
Does it change barrel life or have an effect on accuracy?
I'm thinking of doing a +P on a 25 creedmoor and want to hear from a few people who have done it to their rifles before I go down the rabbit hole.

Are you trying to go with a short barrel length? I’ve had a couple 25 creedmoors both 26” and 2900+ with mild loads and 135 Berger’s and also 134eldm. Terminal effective range is already wayyyy out there.

 

[WKR]

Are you trying to go with a short barrel length? I’ve had a couple 25 creedmoors both 26” and 2900+ with mild loads and 135 Berger’s and also 134eldm. Terminal effective range is already wayyyy out there.

Yeah I want to go with a 22 or 24 inch plus can and still be around 2900 with the berger 133's

 

[willfrye027]

Yeah I want to go with a 22 or 24 inch plus can and still be around 2900 with the berger 133's

Gotcha. Don’t discount the 134 eldm. They’re shooting great in my new build and I trust them to expand better at lower impact than the Berger’s. Plus they’re cheaper.

If you go the +p route very interested to hear what your results are.

 

[WKR]

Gotcha. Don’t discount the 134 eldm. They’re shooting great in my new build and I trust them to expand better at lower impact than the Berger’s. Plus they’re cheaper.

If you go the +p route very interested to hear what your results are.

I'll try the eldm and stick with whatever I can get to shoot best.

Will do!

 

[joshr]

The 6.5 PRC added 95 FPS over the standard throat.

The 30 Nosler shot a 215 Berger at 3020 with a 22” barrel.

Too early to tell on the 6UM. I’ve only had it a week.

Hi @Ryan Avery what powder was the 30nos running?

 

[khuber84]

Hi @Ryan Avery what powder was the 30nos running?

Don't you know he fills everything to the top with N570?

 

[CaptArab]

@Ryan Avery would I be dumb for doing a +p 223AI? Seems like it would give another 250 fps or so over a 223 with cheapo range pickup brass. Think 26" velocity out of a 16" 223.

Yes, I'm aware Arc, BR, GT, and Creed exist - I just like 223s

 

[Ryan Avery]

@Ryan Avery would I be dumb for doing a +p 223AI? Seems like it would give another 250 fps or so over a 223 with cheapo range pickup brass. Think 26" velocity out of a 16" 223.

Yes, I'm aware Arc, BR, GT, and Creed exist - I just like 223s

Yes

 

[CaptArab]

Yes dumb?
Geez where's the enablers when I need them.

 

[Ryan Avery]

Yes dumb. Build a 22 creed