Accurate Arms load for 338MX

[quietman]

I wrote AA and asked them if they had worked up any load data. They gave me a reply using the same AA2520 Hornady has listed.

HOWEVER the recommended loads differ and AA's goes to a higher velocity.

Here's what they sent:
Sam,
We suggest the following.
Caliber: .338 Marlin Express.

Barrel length: 24”

Powder: Accurate – 2520®.

Bullet weight: 200 grains.

Start load: 42.8 grains (2200 – 2300 Ft/p/sec)

Maximum load: 46.5 grains (2475 – 2525 Ft/p/sec).



NOTES:

It’ important to note that SAFETY is our prime concern therefore we strongly recommend.

1. TO ALWAYS BEGIN LOADING AT THE RECOMMENDED MINIMUM “START” LOAD and develop loads in 2% increments towards the MAXIMUM load.

2. CAUTION: Beware of double charging if the loading density is below 50% of the available volume.

Examples:

Ř Most Handgun caliber/powder combinations as well as

Ř A-5744 with reduced loads for rifles.

3. If possible, measure the velocity and correlate with our data.



Regards

Johan Loubser

Ballistician

Ramshot.Accurate Powders

[thearborbarber]

Different rifle, different conditions. They can all have affects on a load.

Just speculation maybe hornady didn't want to upstage their factory load. I emailed hodgdon for data too and they load higher than the hornady data too.

[starfury]

Very interesting... a full 2 grains higher! Thanks for the data - I will use this as I am running up those 160gr barnes TTSX loads.

[Fomdiddle]

Thanks quietman for sharing the info. I also wrote to Alliant Powders for info on the 338 but have not received a response. I like to do business with people that care enough to respond to the needs and requests of potential customers. Fom

[Halwg]

Sam,

Thanks for the data. My brother recently bought a 338 MX and I have been looking for load data. Since I'm using AA2520 for the 35 Remington, this is a good fit. I'm going to work him up a load and hopefully we can chronograph it. His gun has the 22" barrel, so velocities should be a touch slower, but should still be pretty good for deer and black bear.

[Fomdiddle]

I get better velocity out of a lighter load than 46.5. 45.9 gave me 2530fps av. 46.5 only averaged 2515 out of my MXLR. Fom