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Reloading with Accurate 2520 powder

This is a discussion on Reloading with Accurate 2520 powder within the Ammunition forums, part of the M14 M1A Forum category; Anyone here do any reloading with Accurate 2520 powder in LAKE CITY U.S. military cases and have tested with a Chronograph ??? I would like ...


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Old August 31st, 2010, 05:34 AM   #1
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Reloading with Accurate 2520 powder

Anyone here do any reloading with Accurate 2520 powder in LAKE CITY U.S. military cases and have tested with a Chronograph???

I would like to know what wieght in grains you ended up with that was a safe load with a 173-175 grain bullet in a LC case.

I understand about "working up" to a specific load, but just wanted to know if any of you had any experience with Accurate 2520----Is 43 grains of 2520 too much/un-safe with a 173-175 grain military match bullet??? I am using a regular/standard Winchester primer. Thanks in advance

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Old August 31st, 2010, 07:27 AM   #2
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I used a lot of that in the past, when it was 80$ per keg.

Check their web site for load data, but quickload says 43 is getting warm with a 175. 2550 fps.

Thanks from tenn m1
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Old August 31st, 2010, 07:33 AM   #3
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I'd go a no higher than 41.5-42.0gr AA2520 with a 175gr SMK in an LC case. But that's just me. Plenty of velocity without risking overpressure on a hot day. YMMV.

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Old August 31st, 2010, 09:14 AM   #4
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I know 43.5 grains with the 168 Noslers where too hot for my gas guns, very violent ejection. Shot them in my Tikka ISU rifle and they obliterated the X ring at 600 yards. I'd keep my max to 42 grains with the 175 Sierra.

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Old August 31st, 2010, 09:30 AM   #5
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Quote:
Originally Posted by MTU1980 View Post
----Is 43 grains of 2520 too much/un-safe with a 173-175 grain military match bullet??? I am using a regular/standard Winchester primer. Thanks in advance
I've used a lot of AA2520 in LC cases with 168 Sierra HPBT and WIN large rifle primers. 43 grains is too much giving flattened primers and too hard a recoil, so that's way too much for a 175 grain bullet. Sierra lists 175 gr HPBT and AA2520 in a range of 36 min - 41.9 max grains, LOA 2.800". Let us know how it works.

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Old August 31st, 2010, 11:46 AM   #6
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I am currently using 41.5 of AA2520 with 168 SMK in LC74 once fired cases. Do not have chrono data but, shot a 189 5x at 600 with them on Sunday. My loaded Springfield seems to love them.

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Old August 31st, 2010, 02:44 PM   #7
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Here is the old data from Accurate Arms. It hasn't been updated in a while. I think some of it dates back to 1999 or older. Accurate Arms has sourced their powders over the years from Israel, China and now the Czech Republic.

The service rifle load data uses IMI cases to mimic military cases. The standard load data uses Remington cases. All data uses CCI-200 standard force primers. Velocities are from a 24 inch test barrel. (Older IMI cases were heavy like military cases. Later IMI Match cases were xloser to commercial capacity.)

Service rifle data - IMI cases - 175gr SMK @ 2.800"

37.4 - 41.5 grains A2520

2224 fps - 2527 fps

48,900 CUP


Standard 308 Win load data - Remington case

37.8 - 42.0 grains

2303 - 2597 fps

61,000 PSI


180 grain HPBT bullet load data to compare - Remington case

40.1 - 44.5 grains

2302 - 2616 fps

49,200 CUP

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Old August 31st, 2010, 08:19 PM   #8
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You guys are great....thanks a million for all your repsonses. Actually, I have loaded several of the 173-175 grain Military Match bullets in LC cases using 41 grains of the Accurate 2520 powder w/Winchester standard primers----so, it sounds like I am safe there so far. I am NOT looking for exact pin point accuracy....just would like to be able to hit a deer sized target at about 500 yards or so.

Next question, I have some 168smk bullets and some Nosler 165grain balistic tip bullets that I want to load into LC cases---is 43 grains of the 2520 still to warm for these in the military LC case???? thanks again. I will be mainly using these reloads in my Remington bolt gun w/26" barrel----and if needed in my Socom16/M1A.

PLEASE KEEP IN MIND (WHEN YOU RESPOND) THAT I AM USING THE MILITARY LC BRASS WHICH IS THICKER THAN 308 BRASS-----I truly appreciate all your help gang!

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Old August 31st, 2010, 08:39 PM   #9
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By the way guys, I had several pounds of the Accurate 2520 powder I had bought years ago so, I am just trying to use it up. I recently bought some of the Varget powder to try in the 7.62 x 51 LC brass I have.

I have a lot more questions for you guys, but don't want to ask all in one post. I have some pulled 163 grain AP bullets that were pulled from .30 cal (30-06) ammo and want to load it into the LC 7.62 brass and still use the cannalure when crimping the case mouth around the bullet. I would like to know of a good powder for loading those too....???

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Old August 31st, 2010, 10:09 PM   #10
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I do not have my Data Book with me But I did an Experiment with 2520 and Temperature differences .
1st I put 10 rounds in a Ziploc Bag Shoved them in my cooler pack with ice the night before the range trip. Another 10 rounds left in the sun the morning of the trip. the outside temperature was 95 degrees with about 80% humidity
I sent each set thru the Chronograph 10 rounds each both with the same powder charge/
The hot ones ran an average of 87 FPS faster than the Cold ones kept in the cooler until the test.
Although not Scientific it was a good enough indication for me

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Old August 31st, 2010, 10:45 PM   #11
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Accurate Arms 168 grain Sierra Match King load data

Service rifle data (uses IMI cases in place of military cases)

39.2 - 43.5 grains A2520 - IMI cases - CCI-200 primers @ 2.800"

2328 fps - 2646 fps

50,500 CUP

Standard 308 Winchester load data (uses Remington cases)

40.5 - 45.0 grains

2387 fps - 2712 fps

50,200 CUP



Quote:
Originally Posted by MTU1980 View Post
You guys are great....thanks a million for all your repsonses. Actually, I have loaded several of the 173-175 grain Military Match bullets in LC cases using 41 grains of the Accurate 2520 powder w/Winchester standard primers----so, it sounds like I am safe there so far. I am NOT looking for exact pin point accuracy....just would like to be able to hit a deer sized target at about 500 yards or so.

Next question, I have some 168smk bullets and some Nosler 165grain balistic tip bullets that I want to load into LC cases---is 43 grains of the 2520 still to warm for these in the military LC case???? thanks again. I will be mainly using these reloads in my Remington bolt gun w/26" barrel----and if needed in my Socom16/M1A.

PLEASE KEEP IN MIND (WHEN YOU RESPOND) THAT I AM USING THE MILITARY LC BRASS WHICH IS THICKER THAN 308 BRASS-----I truly appreciate all your help gang!


Last edited by John Coleman; January 31st, 2011 at 02:55 PM.
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Old August 31st, 2010, 10:51 PM   #12
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These bullets are a lot longer than anything loaded in 7.62. If loading to standard length or to fit the magazine the bullets will have to be seated past the cannelure. The shape of the forward section of the bullet may or may not allow enough neck tension to hold three bullet. I have used the Lee Factory Crimp Die with them for this reason. I haven't found a great load for them, only a couple of loads that are so-so.

Quote:
Originally Posted by MTU1980 View Post
By the way guys, I had several pounds of the Accurate 2520 powder I had bought years ago so, I am just trying to use it up. I recently bought some of the Varget powder to try in the 7.62 x 51 LC brass I have.

I have a lot more questions for you guys, but don't want to ask all in one post. I have some pulled 163 grain AP bullets that were pulled from .30 cal (30-06) ammo and want to load it into the LC 7.62 brass and still use the cannalure when crimping the case mouth around the bullet. I would like to know of a good powder for loading those too....???

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Old January 31st, 2011, 12:27 PM   #13
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Quote:
Originally Posted by MTU1980 View Post
Next question, I have some 168smk bullets and some Nosler 165grain balistic tip bullets that I want to load into LC cases---is 43 grains of the 2520 still to warm for these in the military LC case???? thanks again. I will be mainly using these reloads in my Remington bolt gun w/26" barrel----and if needed in my Socom16/M1A.

PLEASE KEEP IN MIND (WHEN YOU RESPOND) THAT I AM USING THE MILITARY LC BRASS WHICH IS THICKER THAN 308 BRASS-----I truly appreciate all your help gang!
I am going through this exercise using Sierra and Hornady 168 grain BTHP in properly prepped LC cases, 2.800"LOA, WIN LR primers. I found any charges over 39.25 grains begins to flatten the primers. Charges >41.5 grains of AA2520 threw the cases too far. BUT, I've shot 1"MOA at 100 yds with iron sights with two loads of 39.75 and 41 grains AA2520. Lucky? Perhaps. I'm going to stay below 39.25 grains of AA2520 from now on, and hope the "luck" continues.

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Old January 31st, 2011, 02:55 PM   #14
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A2520 has sometime recently changed from being a Czech-made powder to now being an American-made powder. Accurate has only in the past couple of weeks updated their website. The current A2520 is not the exact same powder that was in their last hard cover load guide. I don't know if the load data has been changed for it but other Accurate powders have changed load data on their website. The PDF website load guide does not have service rifle load data and I don't know if they have a newer hard cover load guide available yet.

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Old January 31st, 2011, 05:17 PM   #15
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I just ran across 10lbs of this powder, so I will again start shooting it. Couldn't pass up 15$ per pound.

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