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Old March 3, 2021, 02:14 PM   #1
mel80
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i joined the darkside 6 arc build

i love my 6.5 grendel/creedmoor but i wanted to try out a 6 arc for varminting and coyotes so i grabbed a 20 inch 65 arms 6 arc barrel , ive got this mated to a km billet gen 2 upper with a km 17 inch hg , rtb bcg with an aa bolt, for the moment im going to put this on my lower i have on my 28 inch grendel but eventually it will make its way onto an ep polymer lower





going to load some 90g gamekings with some staball 6.5 in to get some rounds down the barrel and get it broken in , and my hunting load will be 70g nosler balistic tip varminters using either ppv or ar-comp at around 3300 fps

Last edited by mel80; March 4, 2021 at 10:16 AM.
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Old March 3, 2021, 02:55 PM   #2
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Always interested in your results.
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Old March 3, 2021, 07:36 PM   #3
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ive got it assembled ima load round sup for a ladder test tonight , and if it doesnt snow to bad tonight ill get to run that ladder test tommorow , ill have to resize those pics above and post some fully assembled pics

Last edited by mel80; March 3, 2021 at 07:48 PM.
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Old March 4, 2021, 07:09 AM   #4
Willie Lowman
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dear lord man

resize those pics!
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Old March 4, 2021, 10:16 AM   #5
mel80
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dear lord man

resize those pics!
lol couldnt do it from my phone had to wait till i got on my pc

anyways winter decided to come back with a vengence today so i prolly wont get to do any shooting with it today , but supposed to be back into the 50's tommorow so hopefully then. wanna get something worked up for this rifle by the weekend so i can take it out for some coyotes instead of the grendel
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Old March 4, 2021, 11:16 AM   #6
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dear lord man
She's a young lady--and a very good shot.
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Old March 4, 2021, 02:58 PM   #7
TOU
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Very interesting build. Coincidently I finally got off the fence and acquired a AA 24" complete upper this week to go with my booty CZ 6.5G. (Need to get some 6.5G Magazines. Now you have to post this...

Please report back on magazine feeding as well. Thx!
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Quote:
dear lord man
She's a young lady--and a very good shot.
That makes the pink lower make even more sense. Good on ya!
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Old March 5, 2021, 07:02 PM   #8
mel80
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70g 6 arc nexto a 90g nosler 6.5g

both hose cases are unfireformed so not perfect , the grendel is a necked down 7.62x39 case and ive been converting some of my once fired 6.5g hornaday brass into 6 arc
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Old March 6, 2021, 02:27 AM   #9
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noticed some funky stuff on the shoulder of the brass my friend converted for me so im scraping those rounds , they need to be run back threw the arc die now that i know what the issue is

to start after running the gren brass into the arc die , it needed to be trimmed a good bit then run back into the arc die hard to move the shoulder back and size the neck properly.

my friend had only run the gren brass into the arc die as far as it would go which was not enough without being trimmed a second time , the brass my friend ran for me was trimed back to normal grendel trim lenght , what i noticed was after that first step the brass needed to be trimmed back to 1.490 ish and then hit int he arc die hard a second time , and then finally a small trim back to 1.475 , without the second step threw the arc die the necks are seriously way to tight


from left to right

left 3
nosler 70g balistic tip varminters over 30.5g of ppv should be around 3200 fps out of the 20 inch barrel oal 2.150

next 3 are 80g sierra spbt varminters over 31g of power pro 2000mr expected mv should be around 2750-2800fps oal 2.125 power pro varmint would get theese going a bunch faster but im conserving that powder for the lightwieght arc and heavy grendel bullets

last 4 are sierra 90g fmj gamekings over 30g expected mv in the 27/2750 fps range loaded ot an oal of 2.215 but theese wont chamber so ill have to seat theese deeper and that oal is tbd same here power pro varmint would get theese going faster but saving that powder for other uses

Last edited by mel80; March 6, 2021 at 11:16 AM.
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Old March 6, 2021, 11:16 AM   #10
mel80
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knocked the 90's back to 2.150 and they now chamber
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Old March 6, 2021, 12:28 PM   #11
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Its on my 28" 6.5 grendel's lower for the moment going to build out a dedicated lpower for it thatas identical though
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Old March 6, 2021, 04:20 PM   #12
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No more ATN?
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Old March 6, 2021, 08:56 PM   #13
mel80
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No more ATN?
i use my glass for load dev work i also goofed with my 17inch hg choice now my magneto speed wont fit without sitting up on the flashider not a big deal just gota take that off to use my magnneto speed , only reason its on there is its my supressor qd mount anyways

Last edited by mel80; March 6, 2021 at 09:06 PM.
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Old March 7, 2021, 01:20 PM   #14
mel80
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first up the winner of first round of testing

70 noslers over 30.5g of ppv oal of 2.150


not bad for arbitrarily picking a charge weight and seating depth im not changing a thing with this bullet now i just need solid chrono numbers i think i saw a 3315 flash on my chrono before it errored ( had chrono issues for all 10 shots this am )

and the other testing

top is the 70 noslers . mid is the 90 sierra fmj gk's theese flattened every primer so way to hot aparently and bottom is the 80g sierra spbt varminters , lil work and those should tighten right up

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Old March 8, 2021, 08:28 PM   #15
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waiting on paperwork so i can finish it , then i can send it off for engraving and cerakote, 8 inch full ti with a progressivly stacked ti baffle stack ( 10 baffles in total )
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Old March 10, 2021, 12:54 PM   #16
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That is a helluva group for a brand new barrel and "random", non tuned load.

You have to be very happy with that load.

Thanks for sharing !
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Old March 10, 2021, 09:33 PM   #17
mel80
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Originally Posted by bfoosh006 View Post
That is a helluva group for a brand new barrel and "random", non tuned load.

You have to be very happy with that load.

Thanks for sharing !
heck yeah deff cant complain i think thats the first time ive ever started a load dev and goten something that good on the first set of rounds

on the other hand my custom mcgowen barreled 6.5 grendel will shoot anything i load into .5 moa and when its a good load its about .1-.2 moa but thats not a run of the mill rack barrel either.

ill also have a sixfivearms 6.5 grendel 12 inch barrel here next week to also build/test and after my results with this 65arms arc barrel im really looking forward to it

ive got 20 more rounds of that 70g nosler load loaded up ill shoot a 10rd group to make sure its good and get some chrono numbers and if it proves good it will be my goto varmint/coyote load in that gun .

ill prolly work on that 80g load as well to use on larger game this year but ive got plenty of time for that i dont get my antelope and deer tags till aug 1st and then genderal hunt is in october

the 90's im not even going to bother with really its a low bc bullet so ill prolly load those up as some shtf ammo once i get a load that shoots half decent and doesnt flatten primers
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Old March 24, 2021, 02:47 PM   #18
mel80
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giving my rifle and some ammo to a friend she is also a very capable shooter to test more rounds for me since my work schedule for my new job is hectic af and doesnt allow me the time to go shooting myself , prolly have some more results saturday or sunday
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Old April 3, 2021, 12:40 AM   #19
mel80
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no updates yet friend hasnt gone out with my rifle yet and i got 2nd and 3rd degree burnson over half my hand and wrist at work so i cant even do much myself right now
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Old April 10, 2021, 01:37 PM   #20
mel80
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loving my monster 6 arc 20
70g nosler blistic tip varmints at 200Y

80g sierra sbt blitz at 200 ( starting load )



and gun porn
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Old April 10, 2021, 04:59 PM   #21
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That's some awesome shooting! How long is your barrel again?
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Old April 10, 2021, 05:04 PM   #22
mel80
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Originally Posted by stagpanther View Post
That's some awesome shooting! How long is your barrel again?
ty 20" barrel, https://www.sixfivearms.com/product/...ter-20-barrel/

i may also do a 12" arc build from them

ill be testing my new 12 inch 6.5 grendel this wensday ( also sixfivearms) lol ive got more new builds then i have time to shoot them

edit just incase anyones wondering those are 2 inch targets and im still a little shaky due to the burn on my hand

Last edited by mel80; April 10, 2021 at 05:39 PM.
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Old April 11, 2021, 11:44 AM   #23
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Ok, I got stuck at 28" grendel.....
Can you start over?

So...
"Does your bullet shot from a 28" barrel start to drop before it exits the barrel"?
"Do you often spook game when you accidentally poke them in the ribs while you're settling in for a shot"?
"Does a 28" barrel require a special pickup with yellow flashing lights and a 'wide load' sign when you go to the range?"

All that joking being said, I'm mostly just jealous when I look at your rifle.
And you're a much better shot than I am.
Congrats all around.

Can you use a 28" barrel as a walking stick when you get old?
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Old April 11, 2021, 05:32 PM   #24
mel80
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ty,
its my elr target gun though i have and will hunt more with it i.e predator and varmint control off the tripod at night
its honestly not to badwithout the supressor on it with the collapsable stock but ive been switching to fixed stocks on all my rifles latley. still easier to hike arond with then my ar-10 in 6.5 creedt though

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Old April 11, 2021, 07:10 PM   #25
stagpanther
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Well Mel, after seeing your results and clicking on six five and discovering that the barrel you have is only $159--I ordered one! So that's now one atn and one barrel to your credit. I have a useless AR in 350L which I think is going to sacrifice itself for this project.
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If you’re ever hiking in the woods and you get lost, just look up and find the brightest star in the sky and you’ll know which way space is.
I am NOT an expert--I do not have any formal experience or certification in firearms use or testing; use any information I post at your own risk!

Last edited by stagpanther; April 11, 2021 at 07:18 PM.
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