• This Forum is for adults 18 years of age or over. By continuing to use this Forum you are confirming that you are 18 or older. No content shall be viewed by any person under 18 in California.

6.5 Grendel Ackley Improved

Dave in WI

Runs with scissors
Gold $$ Contributor
Anybody experiment with something like this? Got a customer wanting to do a 6.5 Grendel with the 40° shoulder.
 
like the 6mm turbo AR necked up to 6.5, or just a straight 40 shoulder? Seems interesting; but I've found a TON of 6.5 cartridges out there. Aside from why not, I have a PPC bolt face; I'd ask why? The 40 degree grendel case isn't going to be a 6.5x47, 6.5 Creedmoor, or a 260 Remington, several of those do just fine in a standard short action.

If sticking to PPC bolt face; look to what the 6mm grendel; and affiliates are doing. Getting close to 6BR, but 6Dasher, 6BRA, or others are still a velocity node above the PPC based cases...

If you want maximum from a mini-action I could see it for hunting; or heck just for using the action; but I don't know if I'd hope it would replace the mid-size 6.5s.

-Mac
 
Thanks for the reply, Mac. No answer to the why other than he wants it. Built a 308x1.5 Barnes cuz he didn't want 300 Blackout. He is just a fan of Ackley Improveds and wants to do it with Grendel. Specifically 6.5 caliber. Yes, the 6mmAR Turbo Improved necked up would be pretty much the same.
 
FOR WHAT IT IS IT'S JUST HARD TO BEAT THE LITTLE 6.5 GRENDEL OR THAT'S WHAT I'VE FIGURED OUT WITH IT I'VE MADE SOME PRETTY SHOTS WITH MY MINI WITH 90GR HP ON VARMINTS
 
Well, to each their own. I'd be looking at a 1:8 with the 123-130gr class, and the usual seating to neck shoulder junction. Alexander and Lapua brass is excellent and should have great results. I'm at about .289 for loaded Hornady on neck diameter, 0.290 for Alexandra/Lapua. Certainly a bolt action and may as well be single feed, cause that's what you'll need. Grendel does great with Varget, h335, benchmark, and other powders in that range. May shift toward n140/h4895 more for the larger capacity. Would also recommend a 26" barrel and long throat to seat those bullets way out there. Might be extra fun with the Speer 90 TNT's

-Mac
 
His plan is for a bolt action repeater

Definitely look into what chassis / mags to use. Most Grendel mags are 2.260 and the deeper seating is eliminating the extra room generated. How it'll feed from a short action mag with 2.825" will be a different question, but has probably been resolved by PPC shooters?

-Mac
 
Definitely look into what chassis / mags to use. Most Grendel mags are 2.260 and the deeper seating is eliminating the extra room generated. How it'll feed from a short action mag with 2.825" will be a different question, but has probably been resolved by PPC shooters?

-Mac
The ppc always ends up being a single shot
 
The ppc always ends up being a single shot
Sako made a PPC repeater in the 80's on a fairly short action rifle. As for Grendel Ackley..really dont bother. Good performance can be had by using an action longer than the Howa and running with faster powders,, I use Power Pro Varmint. Well accurate with Lapua brass and 123g projectiles. Also playing with 8208(promising,albeit slower) and Benchmark.
 
Maybe he is a perfect candidate for necking up a new 6GT to 6.5GT. He would have a unique chambered rifle.
 

Upgrades & Donations

This Forum's expenses are primarily paid by member contributions. You can upgrade your Forum membership in seconds. Gold and Silver members get unlimited FREE classifieds for one year. Gold members can upload custom avatars.


Click Upgrade Membership Button ABOVE to get Gold or Silver Status.

You can also donate any amount, large or small, with the button below. Include your Forum Name in the PayPal Notes field.


To DONATE by CHECK, or make a recurring donation, CLICK HERE to learn how.

Forum statistics

Threads
165,474
Messages
2,196,672
Members
78,936
Latest member
Mitch.Holmes
Back
Top