View Full Version : Anybody use 2520 in 7.62
With prices skyrocketing, I have decided to reload for 7.62. My *-14 is headspaced at 7.62, not .308. I am planning on using 2520 and wolfe Large Magnum primers behind either hornandy or Sierra 150's and 168's. Anybody try this combo in an *-14?
Also heard about using a headspace guage to set up the RCBS small base x die. I have real 7.62 head space guages but still don't understand the process of using the guage as a guide.
Any input would be helpful.
My experience with AA2520 was that it's better than nothing for blammo but not good enough for match loads.
I got it in bulk locally from a commercial reloader. You brought in a container and they filled it up. It was pretty inconsistent batch to batch; I've heard others say the same thing about lot-to-lot variations with AA-packaged stuff.
Working up a load everytime I got a new batch wasn't what I wanted to do.
It's pretty temperature sensitive too. Loads that were fine the rest of the year would show signs in summer. I've seen primers blow in .223.
If you've already got the 2520 I'd say go ahead and use it up for practice or plinking ammo.
If you're buying powder I'd go with someone other than Accurate.
Extrudeds like IMR or H4895 or IMR4064 always work well and are very consistent lot-to-lot. Or if it *has* to be ball try BL-C(2) or W748.
The term "headspace" can sometimes be confusing :icon_scratch:
When used in reference to a chamber it's the distance from the datum point (shoulder) in the chamber to the face of the closed bolt. It's the "space" where the "head" of the cartridge case is unsupported. Chamber headspace gauges go in the chamber then you see if the bolt will or won't close on it.
When used in reference to the case itself or to resizing dies it's the length of the case from the shoulder to the base. A cartridge "headspace" gauge is used to measure if the shoulder of a resized case has been pushed back enough to fit into the chamber with that "headspace."
Some gauges will tell you exactly how many thousandths the case is plus or minus; others are simple drop-in made to SAMMI specs. Fits in gauge=fits in chamber. When reloading for a semi-auto with a floating firing pin resizing back to SAAMI min is usually a good idea.
Since the gauges measure shoulder-to-base and not circumference whether the case was resized by a standard or small base die doesn't matter.
Rick from kali
i must have gotten a good lot# when i bought the 32lbs. of 2520 years back. i live in the Mojave desert and have shot this powder in the hot summers and cold winters and have not experinced any problems. this target was shot at 100yds. 5 shots. with my Savage 110 FP .308. i also use this powder in my M-1 Garand 30/06 with excellent results. but then again, i still molly coat my J-bullets.
AA2520 was very popular with M1a shooters in the 80ís. With a 168 Match bullet I would say any load between 40.5 grains and 41.5 grains will be your accuracy load.
I shot this during prone rapid fire at our local 100 yard reduced Highpower match with an M1a. If you hold hard AA2520 will shoot. Though I do prefer IMR 4895 for gas guns.
As for cartridge headspace gages, size your case and drop it into the gage.
For a gas gun, I recommend just sizing to gage minium. Which is the lower ledge in this picture.
I have used AA2520 in both my M1A and 40x and it works great. Reduced loads of 39.5 for 100 yards shoot as well as I do. I've never seen any problems with 2530 in 7.62/308 and still use it (as well as IMR4895 and 4064). Sure meters a lot better than a stick powder too!. 2520 is my standard 100 & 200 yard load with Ar15 using 69 SMK's - have had more than a few of 10X cleans with it. I haven't tried it beyond 200 as I use 77's in 223 for that and 80's for 600 (Varget)
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