7 PRC Powder

[Ucsdryder]

I bet H1000 and Reloder 26 if you can find them. if you’re going to run light weight minis then h4350 will probably get it done!

 

[Overthenexthill]

Can’t wait to get a new recipe started. For now I’ll be shooting factory ammo getting brass inventory. Hopefully some of the powder I have will work.

 

[Flyjunky]

I have tried it in a 300 Rum, 300 PRC, 28N and a 300 Terminator. It’s slooooow.

Same thing in the 6.5prc with the 156, slow speeds. I don’t think I’ve heard of anyone finding a cartridge that powder has done well in compared to other powders.

 

[TxLite]

Following up on this to see if anybody has some validated data comparing various powders.

I’m looking to shoot 175/180gr weight class in my 18” barrel and have found fantastic accuracy with h1000, but man is it slow.

I’ve got a ton of n570 I’m considering using as well as retumbo. Berger shows n570 to generate the best velocity but I’m pretty sure their data is quickload generated and not actual.

Anybody have real world comparisons to share?

 

[gabenzeke]

Following up on this to see if anybody has some validated data comparing various powders.

I’m looking to shoot 175/180gr weight class in my 18” barrel and have found fantastic accuracy with h1000, but man is it slow.

I’ve got a ton of n570 I’m considering using as well as retumbo. Berger shows n570 to generate the best velocity but I’m pretty sure their data is quickload generated and not actual.

Anybody have real world comparisons to share?

Also curious on updates. Sounds like h1000 being slow is common. N570 is appealing other than the barrel life. Rl26 isn't as temp stable....so are guys just going n570 and planning on losing a little barrel life? Guess I'm not even sure what barrel life would be with n570, maybe it's not even a concern. I think I'm going to forgo the +p for now and see what kind of velocity I can get from 180s and a 20 inch tube. If I can get 2800, I think I'm happy with that.

Sent from my Pixel 6 Pro using Tapatalk

 

[TxLite]

Also curious on updates. Sounds like h1000 being slow is common. N570 is appealing other than the barrel life. Rl26 isn't as temp stable....so are guys just going n570 and planning on losing a little barrel life? Guess I'm not even sure what barrel life would be with n570, maybe it's not even a concern. I think I'm going to forgo the +p for now and see what kind of velocity I can get from 180s and a 20 inch tube. If I can get 2800, I think I'm happy with that.

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I am getting 2620 with an 18” and 180 hybrids @ 67 grains H1000 in ADG. That said performance has been great. Low SD, consistent accuracy, good terminal performance out to 400 yards (so far).

Planning to play with n570 and/or retumbo but my free time has been limited lately.

 

[sprink]

I am getting 2620 with an 18” and 180 hybrids @ 67 grains H1000 in ADG. That said performance has been great. Low SD, consistent accuracy, good terminal performance out to 400 yards (so far).

Planning to play with n570 and/or retumbo but my free time has been limited lately.

What primer did you use and how high did you go before pressure signs? I got a Tikka I recently built with a 22” Proof prefit and I’m getting ready to test some loads this weekend. I’ll be using ADG brass, 180gr Hybrids, H1000 and Federal 215 primers. Almost all of the data I can find used Hornady brass so just trying to determine where max might be. I’ll definitely be working up but just curious what your experience was.

 

[TxLite]

What primer did you use and how high did you go before pressure signs? I got a Tikka I recently built with a 22” Proof prefit and I’m getting ready to test some loads this weekend. I’ll be using ADG brass, 180gr Hybrids, H1000 and Federal 215 primers. Almost all of the data I can find used Hornady brass so just trying to determine where max might be. I’ll definitely be working up but just curious what your experience was.

CCI 250. I never finished working up to max. It shot really well at 67gr and was getting too booked up to do additional load testing before the season so I left it alone.

Berger shows the max at 69.9 but not sure that would be attainable before pressure. I’m interested to see where you end up

 

[sprink]

Here’s what I got from my range trip today. I attempted to do a latter test from 63.5gr to 70.5gr in .5gr increments. Unfortunately my magnetos battery was low and would not give velocities but half way through a guy showed up with an extra 9V in his bag so I was able to get some numbers at the tail end. Here’s the specs

Tikka action
22” Proof prefit
H1000 powder
Berger 180gr Hybrid
Fed 215 primer
Virgin 7PRC ADG brass
3.335” COAL (Tikka mag length with just a hair to spare. This was 2.600” CBTO which put me about .07” off the lands)

No velocities for 63.5gr through 66.5gr
67gr 2778fps
67.5gr 2775fps
68gr 2809fps
68.5gr 2858fps
69gr 2854fps
69.5gr 2892fps
70gr 2948fps
70.5gr 2984fps

I didn’t see any typical pressure signs at any point but as alway work up yourself in your rifle. Going back tomorrow to explore that flat spot between 68.5gr and 69gr.

 

[TxLite]

Here’s what I got from my range trip today. I attempted to do a latter test from 63.5gr to 70.5gr in .5gr increments. Unfortunately my magnetos battery was low and would not give velocities but half way through a guy showed up with an extra 9V in his bag so I was able to get some numbers at the tail end. Here’s the specs

Tikka action
22” Proof prefit
H1000 powder
Berger 180gr Hybrid
Fed 215 primer
Virgin 7PRC ADG brass
3.335” COAL (Tikka mag length with just a hair to spare. This was 2.600” CBTO which put me about .07” off the lands)

No velocities for 63.5gr through 66.5gr
67gr 2778fps
67.5gr 2775fps
68gr 2809fps
68.5gr 2858fps
69gr 2854fps
69.5gr 2892fps
70gr 2948fps
70.5gr 2984fps

I didn’t see any typical pressure signs at any point but as alway work up yourself in your rifle. Going back tomorrow to explore that flat spot between 68.5gr and 69gr.

Looks like I have plenty of room to go up. Thanks for sharing

 

[Bfish22]

Was able to get a velocity reading on my 7 prc today. About 70 rounds down the barrel. Just did a rough load work up for this hunting season. Will fine tune powder volume, neck tension and seating depth with once fired brass post deer season. Loaded up to 70 gr h1000 and never saw any pressure signs. Am liking the accuracy potential that it shows so far along with the velocity for a 22” barrel.

Tikka action
22” bartlein #3 barrel
Saami freebore
Berger 175 elite hunter
Petersen virgin brass
Coal 3.34” - jumped .050
H1000 69.5 gr
2950 fps

A Berger 180 hvld coal touching lands in my rifle is 3.34” in case anyone is looking for that measurement for a 180.

 

[cfuentes]

I’ve got a pile of h1000 and Berger 175 elite hunters and hoping for good results.

Hi Bfish… what charge weight did you settle on with h1k??? I saw a good node at 67

 

[Bfish22]

Hi Bfish… what charge weight did you settle on with h1k??? I saw a good node at 67

See above post #31. That was the most accurate in initial work up that I used for hunting this fall. Will fine tune it next spring/summer with once fired brass and sped up barrel.

 

[doc holiday13]

ADG brass will fit 70g of H1000 and if its "compressed" its very lightly compressed. I was getting 2910 fps with Berger 180Hybrids on a 22" barrel

 

[Snailz]

Also curious on updates. Sounds like h1000 being slow is common. N570 is appealing other than the barrel life. Rl26 isn't as temp stable....so are guys just going n570 and planning on losing a little barrel life? Guess I'm not even sure what barrel life would be with n570, maybe it's not even a concern. I think I'm going to forgo the +p for now and see what kind of velocity I can get from 180s and a 20 inch tube. If I can get 2800, I think I'm happy with that.

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Why not try n165, N170, or RL23? RL23 is very temp stable, N165 and N170 should be pretty stable will get you just a tick off RL26 or n570 velocity, and all (esp n165) are cooler burning powders that will give extended barrel life. For the heavies, I’d personally go n170 or RL26 if H1K or Retumbo don’t perform.

 

[Bleeb]

Why not try n165, N170, or RL23? RL23 is very temp stable, N165 and N170 should be pretty stable will get you just a tick off RL26 or n570 velocity, and all (esp n165) are cooler burning powders that will give extended barrel life. For the heavies, I’d personally go n170 or RL26 if H1K or Retumbo don’t perform.

Just ran some N165 thru my 22" proof barrel (~130rnds) ,
175gr ALBRs seated to 3.2600" COAL, or 2.5855" Ogive
Fed 215 primers
Hornady once-fired brass
Temp 52 F

65 gr - 2794 fps
65.3 - 2794
65.6 - 2810
65.9 - 2816
66.2 - 2817
66.5 - 2840
66.7 - 2847 (Hornady book max.)

No obvious pressure signs.

The group averaged 2MOA, but I was in a rush because it was starting to rain. The last two rounds settled in closely. I also changed the neck bushing in my sizing die from .312 to .310, giving me aabout 0.004" neck grip. Maybe a bit much, but the .312 felt really light when seating. That said, I ran ALBRs, seated out to 3.300" with Staball HD and got 3/4" group with the .312 bushing.

 

[lager]

I have been working on a new Bergara carbon with 22 inch barrel, 175 LRAB , RL 26 shoot good at 3030 FPS. Could probably get over 3050. Have not run it up to presure yet. 69 gr H1000 is 2970. Have to compress it over 70 gr. Too bulky .

 

[tibo]

I had better sd and group size with H4831sc than with h1000 out of a 24inch barrel shooting the 180eldm with LR primer. Ueing Magnum primer with H1000 could help but we haven’t seen any for over 2 years in NZ

 

[BuckJ2506]

Been working up a load in my 7 PRC. Ive gotten a couple 1/4" groups at 100 with Retumbo and Reloader26. Gun is a Tikka action with a 20" Proof Carbon barrel in a Xlr Industries Chassis. Working up to find pressure and then deciding where I want to fine tune a load. Started showing pressure signs with 26 at 68.1g of powder. No pressure with Retumbo yet. Ive got 2 more loads to try out tonight. I have more data if anyone is interested. Hornady brass and Fed215M primers


1/4 moa with 69g of Retumbo at 2770
1/4 moa with 69.5g Retumbo at 2815
.190 group with 67g of Reloader26 at 2845
1/4 moa with 67.5g Reloader26 at 2873 low SD

 

[TxLite]

Been working up a load in my 7 PRC. Ive gotten a couple 1/4" groups at 100 with Retumbo and Reloader26. Gun is a Tikka action with a 20" Proof Carbon barrel in a Xlr Industries Chassis. Working up to find pressure and then deciding where I want to fine tune a load. Started showing pressure signs with 26 at 68.1g of powder. No pressure with Retumbo yet. Ive got 2 more loads to try out tonight. I have more data if anyone is interested. Hornady brass and Fed215M primers


1/4 moa with 69g of Retumbo at 2770
1/4 moa with 69.5g Retumbo at 2815
.190 group with 67g of Reloader26 at 2845
1/4 moa with 67.5g Reloader26 at 2873 low SD

What bullet/weight?