Anyone else find hornadys load data with 108s and leverevolution to be extremely optimistic? Not sure if my lot of powder is fast, or if their data is bad but 29.7 is definitely too hot for my gun. 14.5" CLE barrel, rexus bolt. First two looked to be a bit over gassed but were ejecting to about 3:30, 3rd stuck hard enough I couldn't get it out mortaring and had to tear it back down enough to be able to put in my barrel vice to knock it out. ~2625, 2630, 2650 seems smoking hot out of a 14.5" barrel. Had been using a JP bolt but swapped to a rexus immediately before shooting 2 of my previous gas gun load (~29.3gr cfe223), then 3 more of the lvr I wanted to test, had worked up to 29.1 without issue previously

Only other things I can think of is some of the starline had developed rough spots of corrosion, maybe that contributed to it sticking...or maybe the headspace was a bit tighter with the rexus bolt. At least it held 😬

Hoping for Craddock to get some bolts back in stock, but 29.7 looked probably too hot for my gun no matter the bolt...or I had something else going on.

Starline brass, cci450, LVR 29.7, 2.255oal

Gun shoots everything I've ran through it great, glad nothing appears to have been damaged. Closely examined lugs, cam pin etc, all seems fine.

Ideally I'd just run the 30.0 of CFE I run in my bolt gun, but that's a fair bit past gas gun max and thought I was doing good by going by the book and going to lvr for more speed. I've ran a few through of the 30.0 through it, not nearly the pressure signs of the 29.7gr LVR load.

Am I the only one that seems to find their book data way too high with specifically LVR and heavies? Hate to work out the hammer puller but I'm not sure I want to run that even through my bolt gun, despite it being ~1.5gr under bolt gun max.

Hodgdon shows ~28.2 LVR to be max with similar weight projectiles, which sounds more in line with what I saw.

A standard mil-spec AR-15 firing pin should be between 3.271" and 3.280". The AR-15 firing pin we used for this test was 3.278 inches. The Lantac 6.5 grendel firing pin selected for this test was measured to be 3.270 inches.

With Standard AR-15 firing pin (RESULT SHOULD BE 0.028" to 0.036"):

• Rexus bolt - .0305 inches firing pin protrusion
• JP Enterprise bolt - .0325 inches firing pin protrusion
• Craddock Precision HD ARC bolt - .0410 inches firing pin protrusion

With Lantac 6.5 Grendel AR-15 firing pin (RESULT SHOULD BE 0.028" to 0.036"):

• Rexus bolt - .0195 inches firing pin protrusion
• JP Enterprise bolt - .0215 inches firing pin protrusion
• Craddock Precision bolt - .0305 inches firing pin protrusion

ASSUMING your bolt and firing pin lengths are similar to those used in this test, this means that

• you should always use a 6.5 Grendel firing pin in a Craddock Precision HD ARC bolt
• you should never use a standard AR-15 firing pin in a Craddock Precision HD ARC bolt
• you should always use a standard AR-15 firing pin in a Rexus or JP Enterprise 6.5 grendel bolt
• you should never use a 6.5 Grendel firing pin in a Rexus or JP Enterprise 6.5 grendel bolt

If you're still reading.....

maybe it's because you noticed that the measured difference in the lengths of my firing pins was .008 inches but there was always a .011 inch difference in protrusion. No, that's not an error. Protrusion is dictated by the distance from the front of the firing pin flange to the tip of the pin, not the overall length.

^{(Also, for those of you who private messaged me asking about a fix for the Craddock bolt issues, I haven't started working on that yet but will hopefully get to it this weekend.})

Anyone get groups out of their d.wilson 6arc barrels yet? Looking at getting a 12.5 or 14.5. Trying to get a gauge for accuracy

Price seems great. Anyone have experience on them? Looking at a 18”

First 6arc! Need to swap the scope out for something with a mil reticle and a little more precise center aiming point (couldn’t see the middle of the target when shooting groups). Still had no problem making first round impacts all the way out to 1000. 108 ELDMs going 2660

6ARC has been such a great round and I really enjoy its performance. This 12.5” has got me out to 1,200yds, and my 18” has got me out to 1,400yds. Shoots smooth and has definitely become one of my favorite rifles to shoot.

The PLXC has been a great optic for this setup. Still not in love with the chevron BUT it has not hindered my shooting and overall has been a great reticle.

I hope 6ARC takes over everything and everyone!

BUILD LIST
12.5” Noveske Barrel with pinned gas block
Surefire SOCOM6-MINI4 suppressor with brake
Primary Arms PLXC 1.5-12 Griffin Mil Reticle
Aero M4E1 Receiver Set
Cross Machine Tool 11.5” MOD 4 HDX
Geissele SSA-E
Geissele Super 42 Braided Spring w/ H2 buffer
Noveske BCG w/ Noveske 6ARC bolt
Magpul DT-PR stock
B5 Systems P23 grip
MK Machining Scope covers
Radian Charging Handle