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Hornady 150gr fmj load

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Old February 28th, 2017, 07:28 PM   #16
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Best to load low and slow IMHOP

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Old February 28th, 2017, 07:52 PM   #17
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Originally Posted by POLACK View Post
That data is taken from the Hornady 9th Edition... my source is the 7th Edition, although I don't think the Service Rifle data has changed. I find it odd, in the M1 30.06 data, they don't have an IMR4895/150grn load... of all loads.

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Charlie don't get discouraged with the velocity, look for accuracy. M1a's will not have as much velocity as that same load in a bolt action. Or a rifle with a longer barrel.
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Best to load low and slow IMHOP
I'm not discouraged, but I think there is something going on with my reloading technique or choice of components... I'm easily missing 150fps between any number of factory or surplus M80 rounds and my max load of IMR4895 and 145-149grn FMJ bullet. I also have data from the 150grn Hornady (ballistic tip of some sort) and 43grn IMR4895... 2500fps (at 110F.)

I'm not trying to hotrod my Socom, I just want a handload that gets me near M80 ballistics... that missing 150fps isn't doing me any favors.

What I'm thinking is there is something going on with the burn rate of IMR4895, the 150grn bullet, and short 16" barrel of the Socom.

I'm supposed to go shooting this weekend, maybe I'll whip up some IMR3031 loads and run them across the Chrony and see what pops up...

EDIT: Maybe it's the bullet? I'm down to loading the 145grn Prvi component bullet. I've seen complaints about QC and consistency... I'll have to look into that, too.

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Old February 28th, 2017, 08:36 PM   #18
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Quote:
Originally Posted by charlie98 View Post
That data is taken from the Hornady 9th Edition... my source is the 7th Edition, although I don't think the Service Rifle data has changed. I find it odd, in the M1 30.06 data, they don't have an IMR4895/150grn load... of all loads.





I'm not discouraged, but I think there is something going on with my reloading technique or choice of components... I'm easily missing 150fps between any number of factory or surplus M80 rounds and my max load of IMR4895 and 145-149grn FMJ bullet. I also have data from the 150grn Hornady (ballistic tip of some sort) and 43grn IMR4895... 2500fps (at 110F.)

I'm not trying to hotrod my Socom, I just want a handload that gets me near M80 ballistics... that missing 150fps isn't doing me any favors.

What I'm thinking is there is something going on with the burn rate of IMR4895, the 150grn bullet, and short 16" barrel of the Socom.

I'm supposed to go shooting this weekend, maybe I'll whip up some IMR3031 loads and run them across the Chrony and see what pops up...

EDIT: Maybe it's the bullet? I'm down to loading the 145grn Prvi component bullet. I've seen complaints about QC and consistency... I'll have to look into that, too.

I am loading the Hornady 150gr fmjbt with 42.0 gr WW748 with a #34 as my 'in the can' last load for my mil spec brass but forgot to turn my crono on when I fired it. Am guessing 2500/2600 out of my 22" SM

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Old February 28th, 2017, 10:59 PM   #19
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I had a similar problem with a custom Contender barrel I had sold to a friend. Years later I found a production barrel of the same length and the same load was nearly 100FPS slower in the production barrel. I still had the same ammo left from when I owned the custom barrel, we then shot it out of his and it ran faster. After full length sizing my fired brass would not fit into his chamber the base was to large to fit the match grade chamber. This was a straight walled case a 357 Max. the only thing we could chalk it up to was the long throat in my factory barrel letting some gas blow by. Some bullet profiles and seating length may exaggerate this. It was frustrating me at first and had I not had access to my old barrel I would have blamed the chrono or the temp which I never recorded in my log book. Not too many variables in a single shot crack barrel. I've also had my scale play a few tricks on me too but it sounds like that isn't your situation.

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Old March 1st, 2017, 03:56 AM   #20
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You will lose velocity due to the socom bbl being shorter. Chrono some m80 and you'll probably see similar results.

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Old March 1st, 2017, 05:59 AM   #21
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You will lose velocity due to the socom bbl being shorter. Chrono some m80 and you'll probably see similar results.
Did you not read my original post and the followup? (#11 and #13)

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Old March 1st, 2017, 04:23 PM   #22
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Did you not read my original post and the followup? (#11 and #13)
Doh, missed that.

Seems odd you are under that much vs m80 at 43gr..didnt notice it, but chrono work done same day/session.? Any variables between testing?

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Old March 1st, 2017, 04:30 PM   #23
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Doubt it has anything to do with your velocity issues, but there is such a phenomenon known as "fast barrel" and "slow barrel" meaning that even though the barrels may be the same length, twist, diameter, etc. one may produce greater velocity than the other one with identical loads, hence the term of slow/fast barrel. Why that occurs would most likely require a very fat book on physics or internal ballistics study.

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Old March 1st, 2017, 07:09 PM   #24
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As you had mentioned, for the distance you shoot, the accuracy and velocity you are producing is fine. For whatever inexplicable reason, that is your velocity with that load. Interesting that with your barrel, the 168 grain loads get the expected velocity, but 150's don't.

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Old March 2nd, 2017, 05:53 PM   #25
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As you had mentioned, for the distance you shoot, the accuracy and velocity you are producing is fine. For whatever inexplicable reason, that is your velocity with that load. Interesting that with your barrel, the 168 grain loads get the expected velocity, but 150's don't.
It is odd... the only real difference between the two loads is I crimp the 145grn, but not the 168's, and, of course, the bullet. I'm really wondering if it's not the Prvi bullet...

I'm going to load 2 identical M80 loads... one with the Prvi bullet, one with the 150grn Hornady (I don't think I have any of my Winchester bullets left, or I'll use those) and IMR4895, and then again with IMR3031. I'm shooting this weekend at a friends, so I can set up the Chrony and at least clock them.

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Old March 2nd, 2017, 05:59 PM   #26
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Quote:
Originally Posted by charlie98 View Post
It is odd... the only real difference between the two loads is I crimp the 145grn, but not the 168's, and, of course, the bullet. I'm really wondering if it's not the Prvi bullet...

I'm going to load 2 identical M80 loads... one with the Prvi bullet, one with the 150grn Hornady (I don't think I have any of my Winchester bullets left, or I'll use those) and IMR4895, and then again with IMR3031. I'm shooting this weekend at a friends, so I can set up the Chrony and at least clock them.

Let us know your results

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Old March 3rd, 2017, 05:33 PM   #27
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Have you checked the diameter of those Priv bullets? My buddy had bought some imported 147 FmJs think IMI that were short on diameter like .3075. He was working up some subsonics and supersonics i brought my chrono along. He had worked up like 5 rnds in whatever increments and the 1st rnd he fired didnt leave the barrel. Without a squib rod we packed it up back to my place and looked at some data. Should have been enough to push it out but we pulled a few and they were running a little small. We made it back out there and started at the top of the ladder and had another squib some where in the middle. Never slugged his bore my guess is that the bright light wasnt smacking it hard enough in the a$$ to seal it up. Like the other guy said fast barrel slow barrel a lot of things can attribute to that..

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Old March 3rd, 2017, 06:49 PM   #28
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Originally Posted by opelrsx View Post
Looking for some pet loads to start with.
18.5inch fulton armory barrel.
150gr fmj
IMR4895
CCI200
Win brass

Appreciate any inputs.
RTFM

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Old March 4th, 2017, 05:14 AM   #29
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I have been loading M80 equivlent loads for the past 30 yrs or more. I use BLC-2 Powder behind a Hornady 150gn FMJBT for my M80 Duplication Load. BLC-2 is the Commercial version of WC846 which was the original Powder used by Olin Mathiason to load 7.62X51 Rounds for the M14, and M60. See the attached Link for additional info......HT
http://www.inetres.com/gp/military/i...62mm_ammo.html

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Old March 5th, 2017, 07:08 PM   #30
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Originally Posted by charlie98 View Post
It is odd... the only real difference between the two loads is I crimp the 145grn, but not the 168's, and, of course, the bullet. I'm really wondering if it's not the Prvi bullet...

I'm going to load 2 identical M80 loads... one with the Prvi bullet, one with the 150grn Hornady (I don't think I have any of my Winchester bullets left, or I'll use those) and IMR4895, and then again with IMR3031. I'm shooting this weekend at a friends, so I can set up the Chrony and at least clock them.
Here's what I fired today...

1) My original M80 load of 43.5grn IMR4895/145grn Prvi bullet: still 2400fps.

2) Reload of my M80 load 43.5grn IMR4895/145grn Prvi bullet: tipping 2500fps
3) same load with Winchester 147grn bullet: 2540fps
4) same load with Hornady 150grn bullet: 2540fps

5) RG surplus: 2550fps
6) Prvi factory: 2550fps
7) LC16 M80 ball: 2625fps

8) Backup load 39.5grn IMR3031/145grn Prvi bullet: 2475fps
9) same load with Winchester 147grn bullet: 2500fps.

First things first... I was quite surprised that factory LC M80 clocked over 2600fps vs my standby standard of RG or Prvi. I've never had anything in the 145-150grn range clock faster than 2600fps, except at over 110F.

Second... identical handloads of 43.5grn IMR4895 (loaded at different times) clocked 100fps higher. Odd but true; I'll have to pull one of the old loads and make sure there is 43.5grn of powder in there. It's just very unusual.

3rd... I got nearly identical velocity with a less than max charge of IMR3031 using the same bullets (Prvi and Winchester, respectively.)

Takeaway: The Prvi bullets DO clock slightly slower than an equivalent Winchester or Hornady bullet, even with a max load of IMR4895. IMR3031 seems to deliver almost the same velocity at less than max loading vs IMR4895, I will continue to develop handloads with IMR3031 to compare to IMR4895... that may be the magic powder for the 16" barrel of the Socom.

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