20” 6.5 prc (short barrels)

[31perersen]

interesting, following

 

[coyotezapper]

Proof Research 20" carbon fiber barrel w/7.5 twist
Thunderbeast Dominus SR Suppressor
56.2 gr. of RL26 (stout load, but very accurate)
Fed 210 primer
160 gr. Matrix VLD bullet @ 2,930 fps
Alpha brass

Alpha doesn't make 6.5 prc brass

 

[lancetkenyon]

22" 1:7.5" 6.5PRC AW2
These are all max loads. NOT where I ended up.

Lapua brass
CCI BR2

156 Elite
H1000 57.5gr 2919
N565 58.5gr 2916

144 LRHT
RL23 56.5gr 3003
RL26 56.5gr 3008

130 OTM
RL23 57.0GR 3142

130 TMK
RL23 56.5gr 3102

140 Hyb
RL23 56.5gr 3030
H1000 57.5gr 3022

140 Match Burner
H1000 58.0gr 3019
RL23 56.5gr 3009

150 SMK
RL26 55.5gr 2995
Retumbo 58.0gr 2956

129 NABLR
RL23 56.5gr 3119

142 NABLR
RL23 55.5GR 3002

 

[livetohunt]

Just did this with a 16" barrel. Gun has a grey birch chassis and I can zip my backpack up around the gun when its folded.

Its a proof steel barrel. Im at 2600 FPS with the 147 ELDM in the white box factory ammo. Shot 2 with my buddies handloads for his 6.5 PRC and I was at 2800 with the 147. I'm very happy with that speed.

Ken

Ken

 

[PatriotHenry]

Just did this with a 16" barrel. Gun has a grey birch chassis and I can zip my backpack up around the gun when its folded.

Its a proof steel barrel. Im at 2600 FPS with the 147 ELDM in the white box factory ammo. Shot 2 with my buddies handloads for his 6.5 PRC and I was at 2800 with the 147. I'm very happy with that speed. Thats 60 grains of H1000.

Ken

Ken

Yikes, 60 grs of H1000 sounds way beyond max. Gotta be a very compressed load. Your brass will be toast after one firing most likely.

 

[americanquigley]

Good stuff thanks a ton!

 

[livetohunt]

Yikes, 60 grs of H1000 sounds way beyond max. Gotta be a very compressed load. Your brass will be toast after one firing most likely.

Removed, wrong powder. Like I said, wasn't me that loaded it.

 

[azsugarbear]

Alpha doesn't make 6.5 prc brass

You are correct. Serves me right quoting from memory. Checked my loading journal: ADG brass.

 

[Rocketeer77]

I have a 20 inch bartlien carbon 1-7.5 twist. 56.5 grains of n560 is 2960 fps. Lapua brass fed 210m primer 147 eldm

I really don't wish to be a doubting Thomas here but that velocity doesn't seem 100% right, we own two 6.5 PRC rifles with both using 24" barrels. Running N565 59.5gr for similar velocities to your 20" barrel figures. Maybe that's a fast barrel you have.

 

[Rocketeer77]

I got a slow one (don't care it's accurate). 22" proof, Zermatt action, adg brass, 55 grains H1k, 210M primer, 143 eld-x, 2810fps. Retumbo wasn't much better. Originally wanted to shoot 147's in this barrel. They were stupid slow, like sub creedmoor speeds.

Me thinks some claims being made here about velocity outcomes with heavier projectiles, are shall we say very optimistic numbers yes we own two 6.5 PRC rifles.

 

[ewnanney]

FYI, N560 shot much better in my 7PRC with LRM primers that with LR. Noted the 7PRC has larger powder capacity so you may not see this improvement.

 

[badseed]

I got a slow one (don't care it's accurate). 22" proof, Zermatt action, adg brass, 55 grains H1k, 210M primer, 143 eld-x, 2810fps. Retumbo wasn't much better. Originally wanted to shoot 147's in this barrel. They were stupid slow, like sub creedmoor speeds.

I ran out of case capacity when trying to get good velocity using H1k on the lighter projectiles. I found the H4831sc worked better all around, increased velocities and I was still able to get consistently tight groups. I plan to use my extra H1k on 156 bullets.