SIGforum.com    Main Page  Hop To Forum Categories  Reloading    Building a 16" M14 for research. What bullet and powder for 1:10"?
Go
New
Find
Notify
Tools
Reply
  
Building a 16" M14 for research. What bullet and powder for 1:10"? Login/Join 
Yeah, that M14 video guy...
Picture of benny6
posted
I'm building a 16" M14 for myself in an attempt to make an accurate SOCOM 16. The rifle will be built on a Bula Forge receiver with mostly GI parts, a unitized gas cylinder, a Criterion 16" barrel and will be cut with an M852 Manson chamber reamer. I will start off with a Springfield Armory SOCOM 16 gas lock muzzle brake.

I will eventually switch out the muzzle brake to a Delta-P SOCOM adapter and add a SureFire Muzzle brake.

I will be experimenting with a GI fiberglass stock, a JAE chassis, SAGE chassis, Blackfeather chassis, an AG composites carbon fiber stock (bedded) and a bedded Big Red Birch stock.

Scope mount will be a Sadlak Airborne mount.

I have never loaded for the 308 in 16" before. All the loads I have are for 22" barrels.

I am asking for your pet loads for 16" specific barrels that are accurate and efficient. I don't want to burn excess powder that's not needed. I have the current powders on hand:

-8208 XBR
-IMR 3031
-Varget
-RL 15
-IMR 4064
-IMR 4895
-H4895
-W748
-H335

Available Bullets:
-125gr TNT's
-168gr Nosler CC
-175gr Nosler CC
-155gr Berger Hybrids
-168gr Berger Hybrids

The hard part about these rifles is that I don't think anyone knows a good load for them. Once I have a good load, then I can tune the rifle. I did manage to dial one down to 1.3" for a customer after a few range trips and a bedding job. He reported back that the rifle "exceeded his expectations."

Few have really tried to match condition these but I feel its something I need to learn.

Short range (<300yds) and medium range (<600yds) loads are appreciated.

Thanks for your assistance.

Tony.


Owner, TonyBen, LLC, Type-01 FFL
www.tonybenm14.com (Site under construction).
e-mail: tonyben@tonybenm14.com
 
Posts: 2978 | Location: USA | Registered: February 13, 2001Reply With QuoteReport This Post
Member
Picture of sourdough44
posted Hide Post
I don’t know specifics about accuracy, which can be somewhat individual per firearm. I can see some load and function testing at 1st anyway.

For initial testing I would look at one of the 4895s ballpark for burn rate and 150-155 grain bullets. I find that H-4895 meters slightly better, at least through my powder measure. I use Ramshot TAC a fair amount too.

When just testing accuracy I often use a Sierra Matchking in whatever I’m loading for.

I have a new one on the way since Christmas, a rolling block in ‘8mm Label’. It once had a life in the French military(‘used little, dropped once’?) Just wanted to mention the oddball round, the Son has the interest.
 
Posts: 3581 | Location: WI | Registered: February 29, 2012Reply With QuoteReport This Post
Member
posted Hide Post
IMR 4064 with the 168SMK is very much a standard load for the M-14/M1A, for the short to medium range.

In Service Rifle competition circles, I remember people shying away from heavy bullets because of the operating rod.

I think the bullets you listed are fine, except perhaps for the 125TNT which might be too light for the action to operate well.

W748 is not advisable in .308 with the 168-175 bullet weight. Other powders are good, but I would check at the Hodgdon website.

It shows that the highest velocity will be with IMR 4064 then IMR 4895 and then Varget. The fun thing is that Varget shows the lowest pressure and yet is still near the top in velocity. All this is in a 24 inch barrel.
 
Posts: 2813 | Location: Texas | Registered: June 20, 2012Reply With QuoteReport This Post
Yeah, that M14 video guy...
Picture of benny6
posted Hide Post
Right. I understand all that but I wanted to approach this from a new angle. The SOCOM is a unique animal compared to the scout and full length cousins. Although it has the same mechanical function, the gas port is enlarged and traditional loads waste powder.

I was looking for popular loads guys use in their SCARs , 16” AR’s or shorty bolt guns that would be safe in mine.

Most SOCOMS are horribly over-gassed. I’m planning on using a Schuster gas plug and opening it wide open to stop the action from cycling, then tuning it with a good load to get it cycling from there.

I’m looking for good powder and bullet combinations that give me greater that 90% burn before the bullet leaves the barrel.

If I can hit 2500 with 175’s or Berger hybrids using Varget, 4065 or RL-15, that would be great.

I could cut the chamber with a reamer Bette suited for 175’s. I have one on hand. It’s sort of an Obermeyer type reamer.

Tony.


Owner, TonyBen, LLC, Type-01 FFL
www.tonybenm14.com (Site under construction).
e-mail: tonyben@tonybenm14.com
 
Posts: 2978 | Location: USA | Registered: February 13, 2001Reply With QuoteReport This Post
Member
posted Hide Post
quote:
I’m looking for good powder and bullet combinations that give me greater that 90% burn before the bullet leaves the barrel.


You probably need Quickload for such minutae.

Me? I'd just load some Varget - although 4895, 4064, and Re15 did as well - and go shooting. But then I don't have anything longer than 28" or shorter than 20".
 
Posts: 2725 | Location: Florence, Alabama, USA | Registered: July 05, 2001Reply With QuoteReport This Post
Member
Picture of sigcrazy7
posted Hide Post
Given what you're trying to do in such as short barrel, I'd be inclined to start with the faster stuff on your list and go from there. 3031, 8208XBR, 4895, and so forth.

I'm curious about what you come up with for such a short barrel.



Hannibal ad portas. Carthago delenda est.
 
Posts: 5843 | Location: Utah | Registered: December 18, 2008Reply With QuoteReport This Post
  Powered by Social Strata  
 

SIGforum.com    Main Page  Hop To Forum Categories  Reloading    Building a 16" M14 for research. What bullet and powder for 1:10"?

© SIGforum 2019