300 PRC promising results.

[cast1]

Built this rifle for a friend of mine. He wanted a lightweight rig for a Marco Polo Hunt he has in a couple years. LPA Fuzion Ti action, Proof 1:9 @ 24”, Manners elite T5, Triggertech primary. Running 215 Berger’s @ 2920 over 77.1gr of RL26. Got an ES of 7 FPS at .100” jump. Groups .5 MOA @ 100 but the only two rounds fired @ 735 yards grouped as below. I’m very happy with how it turned out.

 

[A&8's]

Nice.

Did you chamber the barrel?

 

[cast1]

Nice.

Did you chamber the barrel?

Yes.

 

[Mordamer]

I only see one impact on the steel?

 

[A&8's]

SAAMI spec'd reamer or other?

Reason I'm asking is, I know 6.5PRC had issues with different freebores from the saami spec. I have a 30 cal barrel on the bench I'm going to chamber in PRC. Just researching what freebore I should go with for Berger 212's.

 

[cast1]

I only see one impact on the steel?

I’m pretty sure the bare spot on the right is an impact. Target rang on both shots. No other impacts on it. Here is a single shot on the preceding target @ 540 yds.

Both of the impacts from the first image were centered up nicely, a little above center, just like this one. I don’t think I was clean off the target but I suppose it’s possible tho. Rifle needs more rounds down the tube to confirm but as I said, early signs are promising.

 

[cast1]

Regarding reamer spec it is SAAMI but it’s jumping a whole .100”. That puts the front of the boat tail just above the neck in this case. If I was ordering a reamer just for the 215’s I might consider a shorter freebore.

 

[jda2631]

Great looking rifle. A Marco Polo hunt is my bucket list hunt. I hope everything works out well for him!

 

[MOUNTIC]

Sammi spec chamber using berger 215s with a CIP magazine are not an issue. Mine are at the lands at 3.727 COAL. I load them to 3.707 and they work well.

 

[cast1]

They will fit fine in a mag box yes but you are leaving a lot of neck unused doing it that way. That was much less of a problem with the 230’s, much shorter ogive. 210 ABLRs were the same way. I probably should have clarified that.

 

[MOUNTIC]

Running 215 Berger’s @ 2920 over 77.1gr of RL26.

You will most likely speed up with that load and the 215s after you get more rounds through it. After the first 80 rounds I sped up 50 fps. Now at 76.9gr Rl26 in a 26 inch tube I get 3018 fps with the 215 Bergers.

 

[MOUNTIC]

They will fit fine in a mag box yes but you are leaving a lot of neck unused doing it that way. That was much less of a problem with the 230’s, much shorter ogive. 210 ABLRs were the same way. I probably should have clarified that.

All good. Here is a pic for reference. Looks about .060 ish. Eyeballing it.

Sweet build though. Your buddy will enjoy that thing.

 

[cast1]

How far back did you seat yours in load development? I took mine all the way back to .120” jump. Best was at 100 off for me. Groups were smallest there too, however shooting for small groups with a lightweight rig burning this much powder isn’t the easiest thing I’ve ever done.

 

[tinytigers]

What does it weigh?

 

[MOUNTIC]

How far back did you seat yours in load development? I took mine all the way back to .120” jump. Best was at 100 off for me. Groups were smallest there too, however shooting for small groups with a lightweight rig burning this much powder isn’t the easiest thing I’ve ever done.

Only the 20 thou off after my "at the lands" pressure ladder test.

Shoots under half inch 5 round groups with single digit SDs so I didnt need to do anything else with it. 400 some down the pipe and going strong.