M14 Forum


Results with 155-gr Loads/Reloads?

This is a discussion on Results with 155-gr Loads/Reloads? within the Ammunition forums, part of the M14 M1A Forum category; What are your results? I've posted this elsewhere and and not getting any reports of what accuracy levels people are getting out of their M14 ...


Go Back   M14 Forum > M14 M1A Forum > Ammunition


Reply
 
LinkBack Moderator Tools Display Modes

Old April 30th, 2010, 09:44 AM   #1
Newbie
 
Join Date: Jun 2006
Location: da West
Posts: 12
Results with 155-gr Loads/Reloads?

What are your results?

I've posted this elsewhere and and not getting any reports of what accuracy levels people are getting out of their M14 types.

Hornady Match ammo with A-Maxes shoots MOA or better, but I can't get reloads with SMKs (older 2155), Noslers, A-Maxes, or even Bergers (found a hot deal on their first version) to group tight.

Best is about 1.1 inches at 100 yards, rare and not very repeatable. Most are 1.4-1.8 inches. Some are 2.0-2.3. Hot-rodded one load with A-Maxes and 3 shots went into 3.5 inches.

The barrel time shown by QuickLOAD for the powders I've used are in the vicinity what another source says is halfway between "optimum barrel time" nodes for a 22-inch barrel. Maybe there's something to that after all, but my 175 and 178-grain loads are shooting .6 to .9 inches at 100 yards quite reliably, and they're not on the supposed OBT node either.

For me, it's so much for the theory that lighter bullets do better in a 1:12 twist. They don't, but the 175s do.

Can any of you get the 155s to group, and if so, how?

Grump is offline  
Remove Ads
Old April 30th, 2010, 12:27 PM   #2
Grunt
 
Join Date: Dec 2009
Location: Texas
Posts: 83
My Gun LIKES:

Hornady .308 Match Brass
Hornady .308 A-Max 155 Grain Bullets
IMR 4895 Powder 41.1 Grains
CCI Benchrest Large Rifle Primers

Dacotua is offline  
Old April 30th, 2010, 12:48 PM   #3
Scout Sniper
 
Join Date: Jan 2005
Location: Western Colorado
Posts: 779
Exclamation Rate of Twist

It's not bullet weight that should determine twist rate, it's bullet length!

The old Greenhill Formula that specified a certain rate of twist for bullets of a certain weight has been obsolete for years. It was originally based on round nosed bullets, so one could figure that the heavier the bullet was the longer it would be.

That old standard is no longer valid. The correct rule of thumb is the longer the bullet - the faster the twist. It is quite common for a lighter bullet of a certain diameter to be longer than a heavier bullet of the same diameter due to bullet design. Many of the modern 155's in .308 diameter are longer than some of the 175's like the SMK. This is even more true with the new solid alloy bullets which tend to weigh less for a given length.

I haven't finished playing with the 155's in my LRB yet, but I can tell you a few of the things that I found out -
I cant get the VLD's to group well when seated at magazine length (2.800" +/-) but they're really not suppposed to.
I've had better results with the Sierra Palma's than the SMK's.
The Lapua Scenar 155's look promising.
Launching the 155's fast enough to take full advantage of them out of an M14 is pushing (or exceeding) the design limits of the rifle. Excessive pressure combined with a pressure curve that is beyond the design parameters of the M14 can only cause bad things sooner or later.

Sherlock308 is offline  
Old April 30th, 2010, 03:46 PM   #4
Lifer
 
Dave P's Avatar
 
Join Date: Jan 2004
Location: North Woods of Florida
Posts: 2,805
Grump, I firmly believe in OBT and Quickload. But I say that OBT's do not apply to M14's and Garands due to all the crap out front throwing off the harmonics and therefore calculations. OBT is wonderful for bolt guns, but ...

I have been shooting a boatload of nos 155's the last couple of years. Shoot well in most -14's. 44 gr Varget is a standard, and 45 gr is nice too.

Nothing wrong with 1.5 MOA groups - anything better is a fluke, AFAIK.

Dave P is offline  
Old April 30th, 2010, 06:15 PM   #5
Fire Team Leader
 
doubledown's Avatar
 
Join Date: Aug 2008
Location: Central CT.
Posts: 206
The most accurate load in my loaded is:

155 grain Hornady A-Max

43.3 grains IMR 4064

CCI 34 primers

Nato brass


Hits golf balls at 200 yards.

doubledown is offline  
Old April 30th, 2010, 11:05 PM   #6
Newbie
 
Join Date: Jun 2006
Location: da West
Posts: 12
Thanks!

Dacotua:
Group sizes and velocities? I'm intrigued.

Doubledown:
Nice reading on your group size/targeting capabilities. What's the speed?

To all: Running QuickLOAD, with the powder speed adjusted to match my velocities with at least four powders, I'm seeing port pressure be the limit before chamber pressure. This is especially after I realized that the bullet is clearing the gas port at 12.5 inches of travel, rather than the 14.1 I was looking at before (port's 14.125 from the boltface--QL goes my bullet distance traveled). Was all ready to hot-rod with Reloder 15 until I checked that. For 155s, the conclusion is that some powders will max port pressure at about 2850 fps, most at about 2810 some right at 2750. In every instance, chamber pressure was predicted to be definitely NOT max.

Grump is offline  
Old May 1st, 2010, 01:51 PM   #7
Old Salt
 
sac troop's Avatar
 
Join Date: Jul 2007
Location: Northwest
Posts: 1,606
In my experience some barrels just don't like 155's. IMHO this may have more to due with the 155's relatively smaller baring surface ( the part of the bullet that actually contacts the rifleing) than most other bullets. With the wider variety of 155's available today theres a better chance of a rifle liking certain brands of 155's than others.

sac troop is offline  
Old May 1st, 2010, 02:38 PM   #8
Fire Team Leader
 
doubledown's Avatar
 
Join Date: Aug 2008
Location: Central CT.
Posts: 206
Grump, I don't have the velocity on the A-maxes, too lazy to drag the ohler 34 out. I will get around to it soon as I have a couple of other loads I am working on 50 Beowulf, and .500 Jeffery.

I hope this link works, this was from a couple of months ago.

http://m14tfl.com/upload/showthread.php?t=80797&page=2

doubledown is offline  
Old May 1st, 2010, 08:20 PM   #9
Grunt
 
Join Date: Dec 2009
Location: Texas
Posts: 83
Quote:
Originally Posted by Grump View Post
Dacotua:
Group sizes and velocities? I'm intrigued.
OAL : 2.800"
Group sizes are slightly under a inch for me at 100 yards.

I quite measuring velocities a while back and I just measuring my groupings.

I generally go hunting a lot, and I found that the 155 Grain A-Max are quite destructive on white tail deer and feral hogs. So it was more important to me to be able to hit where I want, and not speed. (Yeah I know many will say not to use A-Max Bullets, but from my experience they work REALLY WELL on Deer and Hogs).

Dacotua is offline  
Old May 2nd, 2010, 05:50 AM   #10
Automatic Rifleman
 
Join Date: Aug 2004
Location: Northwest Ohio
Posts: 147
I thought my rifle didn't like 155's either until I got some Black Hills Gold with 155 AMAX and shot a 5-round cloverleaf at 100 yards.

After that I measured the OAL and tried to replicate that as best I could with my loads.

Using Lake City brass that has been small-base resized, trimmed, flash holes reamed and primer pockets uniformed I was able to get very good results with 155gr AMAX bullets over H4895 and WLR primers...though not as good as the Black Hills Gold. Don't try to run them too hot. 2700 FPS is about my average for this load. If I push them closer to 2800 I get pressure signs and erratic accuracy. Also, I jump them a little, OAL 2.790"

artifex is offline  
Old May 2nd, 2010, 06:43 PM   #11
Automatic Rifleman
 
Join Date: Dec 2006
Location: Oklahoma
Posts: 174
Here's what works for me.

http://www.m14tfl.com/upload/showthr...ght=Nosler+155

http://www.m14tfl.com/upload/showthr...ght=Nosler+155

pbcaster45 is offline  
Old May 16th, 2010, 04:45 PM   #12
Scout Sniper
 
Nomad's Avatar
 
Join Date: Nov 2004
Location: Idaho
Posts: 801
Lots of interesting information

Nomad is offline  
Old May 16th, 2010, 06:09 PM   #13
Designated Marksman
 
SingleSotVictor's Avatar
 
Join Date: Sep 2005
Location: Back home in TEXAS!
Posts: 622
I have been trying loads with Nosler Custom comps 155 and RL-15. So far I am happy with 42 grs. Though I have not chronoed the load yet. My groups were in the 1.5-2.0 range, but I have found that I have a coonector lock issue that is causing me some problems. I went up to 43 grs but saw no improvement so I decided I would stay at 42.0 grs. No pressure signs or hard cycling noticed.

SingleSotVictor is offline  
Old May 16th, 2010, 07:55 PM   #14
Professional Slacker
 
Join Date: Dec 2009
Location: Mississippi
Posts: 2,179
load

Quote:
Originally Posted by doubledown View Post
The most accurate load in my loaded is:

155 grain Hornady A-Max

43.3 grains IMR 4064

CCI 34 primers

Nato brass


Hits golf balls at 200 yards.
This is funny, in my last range outing, I tested many different loads, not any 155's, but my most accurate by far was the 147gr fmj in front of 43 grs. of 4064. Outstanding accuracy.

ripsaw is offline  
Old May 17th, 2010, 06:01 AM   #15
LoB
Lifer
 
LoB's Avatar
 
Join Date: Jun 2008
Location: Central NY
Posts: 2,074
I just got a five shot 1.5" 100 yard group yesterday with Hornady 150 gr FMJs over 41.5 of IMR4895, 2.800 COL, with irons, through a 18" Bush Rifle.

These are those farked up bullets with a canelure that is no where near being right for .308 OR 30.06.

The Amax 155s did not perform much better. I had one five shot group that came in at 1.25" with 43.5gr of that RG4895 crap. Same standard Bush Rifle.

Been working with the RG4895 to find a good load just because I bought 16lbs of that crap from Wideners and don't want to waste that money. I am finding that there is only about a 2 to 3 grain window where this stuff works on 7.62x51 and can't get an acceptable load at all for the Garand. MUCH slower than IMR4895. The RG4895 jug came with ONE load on the label . . . 147gr FMJ over 44gr RG4895 in 7.62x51. 45gr is a compressed charge and shows flattened and cratered primers, 43 grains starts to show signs of underpressure . . sooty neck, 42gr the whole case is sooty. . . . . And this stuff throws fireballs that trip those satelites that look for nuclear detonations . .

The fubar 150gr FMJs are one half the cost of the Amax . . . Guess which bullet I'm gonna use.

I will be posting a complete range report soon.


Last edited by LoB; May 17th, 2010 at 06:16 AM.
LoB is offline  
Reply

  M14 Forum > M14 M1A Forum > Ammunition



Search tags for this page

155 amax 308 loads

,
155 amax loads
,
155 and 4064
,
155 grain
,

155 grain a-max reloads 308 h 4895

,
155 scenar 4064
,
155gr 4064
,
155grain loads with rel 15
,
47 and half gr. 4064 155 amax
,
hornady 155 4064 garand
,
hornady 155 amax rl15
,
load data for hornady 155 amax rl 15 308
Click on a term to search for related topics.

Moderator Tools
Display Modes


Similar M14 Forum Discussions
Thread Thread Starter Forum Replies Last Post
AA2230 and IMR 3031 loads for 155 SMK mvintx Ammunition 13 February 20th, 2011 07:28 AM
Getting Dialed in... Mixed Results w/Ammo Ole Silver The M14 16 March 14th, 2010 03:13 PM
M1 Garand 30.06 155 gr Nosler CC BTHP Load Development hammonje Ammunition 4 March 7th, 2010 04:25 PM
Best SHTF bullet/ammo? spanky Ammunition 24 August 24th, 2006 05:17 AM
2005 National Trophy Match Rifle Shooters 28 Jul Spikenfritz Rifle Competition 0 July 28th, 2005 05:04 PM



Top Gun Sites Top Sites List