7mm PRC H1000 recipe? and/or bullet suggestions?

[Harvey_NW]

ADG brass ran thru PMA mandrel
H1000- 68.3 gr
180 ELD M
.0250 off of lands
mine is 3.320
Fed 215M
24 inch Nexus Gunwerks
2950

SAAMI chamber or custom throated for 180's?

 

[Jtwessel91]

I’m currently at around 150 rounds down my 24” bartlien tube right now and going to start load development real soon. I’ve been seeing 2890 fps average with 66.9 g h1000, 175 eld-x, fed 215m primers, adg brass. Tried running 66.3 grains yesterday following OBT nodes and managed 2885fps. Gun shoots lights out but I haven’t gotten any serious load development done since barrel is still speeding up. Super excited and glad I found this forum as I was wondering if 68ish grains was in the realm of possibilities. Just didn’t want to push my new barrel too hard as I’ve only worked up to 67.5 so far with zero pressure signs. Following GRT I should have a node in the high 67 grain realm so that’s what I’m hoping for

 

[Harvey_NW]

OBT nodes

 

[Jtwessel91]

View attachment 857863

possibly. I love to tinker and I already had a load worked up for another rifle and when I ran the numbers after the fact my load was .2 grains off where the calculator said I should be. Figured I’d try it for my new 7prc. Still running full load development but curious if I’m going to find a node close to where the program is saying I will.

 

[Harvey_NW]

possibly. I love to tinker and I already had a load worked up for another rifle and when I ran the numbers after the fact my load was .2 grains off where the calculator said I should be. Figured I’d try it for my new 7prc. Still running full load development but curious if I’m going to find a node close to where the program is saying I will.

By all means tinker away, but for the sake of saving components in the future if you decide to take the shortcut, nodes haven't been proven to exist in a statistically valid manner. The OCW/OBT stuff is typically just random distribution of insignificant samples of shots that all fall within the true cone of fire. In short, the load combo either shoots well, or doesn't.

 

[Ohiohuntr]

has anyone noticed a change with ES with 210s and 215s with h1k, with n570 I made the switch to 210s and it cut my ES almost in half I know it’s a h1k thread, I just decided to make the switch back because I wasn’t happy with my groups

 

[skip189]

70.5 grs of H1000
Nosler 160 Accubonds
Running right around 3060 out of a 22 inch barrel.
Shoots right around .5moa

Another load:
66.4 grains of N560
175 ELDX
Think velocity is around 2960 out of 22 inch barrel
Shouts small groups, even out to 500.

 

[Harvey_NW]

has anyone noticed a change with ES with 210s and 215s with h1k, with n570 I made the switch to 210s and it cut my ES almost in half I know it’s a h1k thread, I just decided to make the switch back because I wasn’t happy with my groups

In the past I've done some testing where a standard large rifle primer was much more consistent than a magnum, but anymore I question those results because of my cheaper chronograph. It really takes a big sample size and a very accurate chronograph to get good velocity data. Personally I would take whichever one groups best and test it at distance. I've had a couple different loads that recorded up to 70fps ES and never gave me any issues hitting targets out to 1,000 yards.

 

[doc holiday13]

I'm finishing a new load today
69g H1000
Fed215's
ADG brass
175-ELD-X
I'll probably be somewhere about .120-.115 jump to lands. I tried loading longer than factory and groups opened up big time. A .065 jump was shooting something like 1.5" groups. the .120 jump was sub 1/2"

Only reason to try a few rounds at .115 are to see if it stays in the accuracy node. Once OAL is finalized I'll load up the remaining 80 bullets i have

This is a seekins factory chambered barrel

*Update 4/1/2025

ended up with a avg. velocity of 2885 and std dev of 7.8 This velocity combined with the BC keeps the bullets above 1800 fps at 900 yards. Plenty far enough for hunting purposes. My memory is a little fuzzy at the moment but i'm 95% sure I can bump this load another .75-1 grain. 70.5 grains is where i started to see the slightest of primers flattening using 180g bullets. I also have not tried loading loading closer than .065 from the lands. its possible there is an accuracy node somewhere in .03-.015 jump; but i'm only gonna gain maybe 30-40 fps. Also with such a large jump, i will have plenty of "breathing room" to load a longer OAL and put the bullets back into the accuracy node when i start getting throat erosion. I'll start looking at new loads when I get down to 10 remaining bullets. I may load some 180 VLD's or 180 Hybrids

 

[Harvey_NW]

A .065 jump was shooting something like 1.5" groups. the .120 jump was sub 1/2"

3 shot groups?

 

[doc holiday13]

3 shot groups?

5 shot

 

[Harvey_NW]

5 shot

So still 50-60% statistical variability in group size. I wouldn't put much faith into those results, if you really want to know the capabilities anyway.

 

[FlyingScot]

ADG brass ran thru PMA mandrel
H1000- 68.3 gr
180 ELD M
.0250 off of lands
mine is 3.320
Fed 215M
24 inch Nexus Gunwerks
2950

If you don't mind, what diameter mandrel has been working well for you with the ADG brass?

 

[BossGobbler2024]

168 gr LRX bullet with 72.3 g H1000 10 shot avg 2850 0.75 MOA at 200 yds with SD 14.s 18 inch gunwerks barrel with elite iron suppressor. I need to look up the jump distance if your interested.

 

[Grunt-N-Gobble]

168 gr LRX bullet with 72.3 g H1000 10 shot avg 2850 0.75 MOA at 200 yds with SD 14.s 18 inch gunwerks barrel with elite iron suppressor. I need to look up the jump distance if your interested.

I'm certainly interested. I have the same bullets and will be starting load development for my 307 this weekend.

 

[BossGobbler2024]

I'm certainly interested. I have the same bullets and will be starting load development for my 307 this weekend.

I wont be back home until April 29th. I will look that up for you.

 

[Sako300]

If you don't mind, what diameter mandrel has been working well for you with the ADG brass?

I am running the .283’’ mandrel

 

[just.mark]

7mm prc
67.6gr H1000
Primer: WLRM
Brass: Hornady
Bullet: 180gr ELDM
.025 from lands
22in proof barrel with Scyth ti supressor.

100 rounds down the barrel averaging 2890fps with a SD of 10fps.

10 x 3 rounds groups at 100 averaging .47 MOA.

Haven't done grouping at 500 yet.

Just sharing for awareness. No pressure signs, just shot a super tight group during ladder testing. It might shoot better but I'm cool with it.

 

[BossGobbler2024]

I'm certainly interested. I have the same bullets and will be starting load development for my 307 this weekend.

Sorry It took so long to reply. I was travelling and got home and had to catch up. Anyway, the jump for my Fierce 300 WSM and 165 TSX bullet was .100, measured base to ojive was 2.252 inches. Barnes recommends anywhere from 0.050 to 0.200 inches for jump.
EDIT:
Sorry for wrong calibur. Mind on different stuff. For My 7PRC load data it was 0.054 jump using H1000.

Good luck.

 

[Grunt-N-Gobble]

Sorry It took so long to reply. I was travelling and got home and had to catch up. Anyway, the jump for my Fierce 300 WSM and 165 TSX bullet was .100, measured base to ojive was 2.252 inches. Barnes recommends anywhere from 0.050 to 0.200 inches for jump.

Good luck.

300 WSM?.... I thought you were talking about your 7PRC, since that's what this thread is about.