6 PRC reloading

[TimberHunter]

[mention]hereinaz [/mention]

But then it wouldn’t have the unique, one off chambering effect! I can appreciate the work you and NSI have put into it, my two cents (which is worth zero cents) is that it would be cool if it maintained the one off, unique chambering. But I can see the allure of factory ammo for a lot of people if it became a more standardized offering


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[hereinaz]

The long throats are rarely a handicap
Most of the lighter 6mm bullets shoot well with a long jump just by their design so you can optimize for heavies but still get very acceptable accuracy from the lighter bullets
My 6 prc lives on 109 eld-m but will shoot 95 ballistic tips and tmks all day they’re a mile from the throat
I shot 50 80g eld-vt and they were close to 1” for 10. Yugge jump
Just good for thought

Edited to add: current freebore unknown
It was lengthened with a uni throater
109 eld-m is 2.950 COAL and jumping .030 if someone can reverse that math.


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Generally I am with @amassi. Long throats don’t bother me and I never worry about jump.

With manufacturing and tighter tolerances in the newer cartridges, I think if there ever was a benefit from jamming jump like the old bench rest guys did, it is gone. Eric Cortina, who tests and figits as much as anyone stopped chasing the lands.

Concentricity of the chamber and ammo, combined with not a lot of “slop” for the bullet to start off center, and the jump is eliminated as a possible problem. Now, individual rifles may show benefit, but I have never seen it show up for my purposes.

I don’t throat longer than necessary, just depending on the bullet so it seats nicely in the neck.

The 140 throat will shoot up to the 110 grain without pushing back into the neck any further than optimal. Like he said, the 95 are jumping and still shoot good.

The 180 throat adds just a bit more to accommodate the 112-115 bullets. The 140 will work fine, and shoot it 300 times and then the throat will be 180, lol.

 

[Muledeerfanatic]

I just picked up a 6 PRC and have been messing around with it a bit
Have been trying to use up random powders sitting on the shelf and clean up my reloading room a bit
Tried some Magpro and H4831sc with the Dtac's and am getting great accuracy and way better speed than I thought I would
Magpro is 3200 easy and 4831 should be around 3100+
Gonna burn that stuff up this winter and spring then move on to 565 and H1000 for hunting loads

 

[Runolfson]

I just picked up a 6 PRC and have been messing around with it a bit
Have been trying to use up random powders sitting on the shelf and clean up my reloading room a bit
Tried some Magpro and H4831sc with the Dtac's and am getting great accuracy and way better speed than I thought I would
Magpro is 3200 easy and 4831 should be around 3100+
Gonna burn that stuff up this winter and spring then move on to 565 and H1000 for hunting loads

Barrel brand/ length?

 

[Muledeerfanatic]

20" from UM on a Vesper
Whatever barrel they use, can't remember

 

[Runolfson]

20" from UM on a Vesper
Whatever barrel they use, can't remember

Probably an Ace. Did UM have the reamer? Or a rental?

 

[Muledeerfanatic]

I bought it from a guy that had them build it and never shot it
I assume they have reamer
Yes an ace barrel
7.5 twist

 

[Muledeerfanatic]

First shot with it other than some sighters was a wolf a couple weeks ago
Dtac hammered that thing

 

[Rkilgore]

First shot with it other than some sighters was a wolf a couple weeks ago
Dtac hammered that thing

What was your impact velocity on the wolf with the Dtac?

 

[Rkilgore]

I recently put together a 6 prc on a tikka action. PBB 1:7 19” prefit. Lapua brass, 112 Barnes match burner, br2 primer, 56.5 gr n565, mv 3,120fps. First time using @Formidilosus load development system. Picked a bullet, seated to 50 thousand off lands, under pressure powder charge, and shoot the heck out of it. Orange dot group was rounds 11-20 out of this rifle. Steel plate was 15 rounds at 400 yards off of shooting sticks. I’m afraid I’ll burn this barrel down before hunting season.

 

[benconfused]

I recently put together a 6 prc on a tikka action. PBB 1:7 19” prefit. Lapua brass, 112 Barnes match burner, br2 primer, 56.5 gr n565, mv 3,120fps. First time using @Formidilosus load development system. Picked a bullet, seated to 50 thousand off lands, under pressure powder charge, and shoot the heck out of it. Orange dot group was rounds 11-20 out of this rifle. Steel plate was 15 rounds at 400 yards off of shooting sticks. I’m afraid I’ll burn this barrel down before hunting season.

Am I doing the math right, based on your screenshot - .243 mil = .83 MOA?

 

[Rkilgore]

Am I doing the math right, based on your screenshot - .243 mil = .83 MOA?

Ballistic-x says .87, not that I care that much. It’s a much smaller group than I need for my hunting purposes.

 

[Muledeerfanatic]

What was your impact velocity on the wolf with the Dtac?

No idea but it was like 120 yards so pretty fast