Grendel loading data?

[jasonZ]

I've done alot of reading on different websites and I found a thread where a guy loaded 30grs of IMR 4895 under 123gr Amax's. I was going to attempt this and actually loaded 10rds with 28.5grs under 120 Nosler ballistics. My question is, after finding some other pressure data, is this to much pressure for an AR setup? I'm concerned and not sure if I should shoot em or not. I've read that you really don't want more then 45,000psi in an AR setup. I'm concerned, any info would be appreciated.

I think I'll just stick to H335 and call it good, but thought I might try this to see how it grouped. Thanks Jason

 

[jbailey]

Re: Grendel loading data?

Not knowing anything about IMR 4895, I can't offer any direct advice. I can say this however:

(1) Check the loading data here:

http://www.snipershide.com/forum/ubbthreads.php?ubb=showflat&Number=1748390&page=3

(2) have you worked up to this IMR 4895 load at all or have any experience with the powder in your Grendel? Loading up hot loads that you find on the internet is a good way to get into trouble and I would advise against it. Start with a safe powder charge on a powder from a loading manual and work up to the higher pressures.

 

[jasonZ]

Re: Grendel loading data?

well my Lyman book, which is their newest edition, doesn't show any info on the Grendel. I've been finding most of my info online. Mostly from Hogdon and reputable sites as such. I was looking and forgot to grab some powder. I was really wanting to load a few different to try and found that info. It was actually in a thread here on the hide. I just don't know if he was shooting an AR platform or if it was a bolt gun. I don't know, I may break em down and redo the loads. I found some H335 after I got 10rds done though! We'll see, thanks for the link though, however, alot of that was on suppressors.

 

[DRAM40A1]

Re: Grendel loading data?

AA2520 is THE powder for 123s.

 

[eleaf]

Re: Grendel loading data?

DON'T DO IT!!!

The Alexander Arms load data shows 4895 for 123 Scenar and SMK, and the max load is 27.7 grains. You're 10% OVER their max.

Hodgdon doesn't even have 4895 listed for their data in 6.5 Grendel (free from their site - http://data.hodgdon.com/cartridge_load.asp ). Seems like the manufacturer would put it in their own load data were it even remotely appropriate

Hornady doesn't show 4895 in their load data for the 123 Amax.

Sounds like bad news to me. I would avoid it, or if you're set on trying 4895, drop your loads and work up appropriately.

I would start with A 2520, Win 748 or H BL-(C)2.

 

[PittsDriver]

Re: Grendel loading data?

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: DRA-M40A1</div><div class="ubbcode-body">AA2520 is THE powder for 123s.</div></div>

Agreed even though it's a pain to meter and the load is compressed. It's all I'm running in my Grendel.

RT

 

[jasonZ]

Re: Grendel loading data?

I did load some with 4895, 5rds with 26.5grs. I also loaded 5rds with H335, 26.5grs and 5rds with 26.5grs of varget. I'm gonna try those, because that's what I have on hand. If I don't like em then I'll order something else. Most likely what you guys have suggested. We'll see how they group and what velocities are. I'll try to report back. Thanks for the info fellas.

 

[user]

Re: Grendel loading data?

Another vote for 2520...supper accurate with 123 Scenars in my stick

 

[jasonZ]

Re: Grendel loading data?

So how about this one! Any of you guys ever resize 7.62X39mm (SKS) brass to 6.5G? I was reading about it and they say that the brass has to be fire formed after resizing to get the angle of the neck right. Anybody done that and if so, exactly how did you go about it? According to what I was reading, you put a "light" load in the case and simply fire it in the gun. Then bang your brass is GTG. I am wondering what a "light" load is? Is it simply a few grains less or would a guy just put 10-15grs in a case and call it good? I hate to waste bullets to do this, so I am wondering if a guy could load a few grains less then normal, say 20-24grs and be ok with firing the round like that. I don't know, but I have some SKS brass around and I resized it to 6.5. I guess I'm gonna have to try it and see what happens.

Another question I have is case length. Every site that I go to has a different max/min case length listed. AA says 1.526-1.520 and my virgin Hornady brass is in the 1.515 neighborhood. Also the SKS brass measured in the same 1.515 neighborhood after resizing. Any input on this or is just what will fit and function in your rifle?
Thanks Jason

 

[redge]

Re: Grendel loading data?

I have fire formed the 7.62 x 39 for my 6.5G, I used a 120 gr sierra's I don't have the data in front of me right now. It was close to the minimum load recommended. The fireform loads actually are shooting better than 1moa when fire forming. Therefore I don't see it as a waste, they shoot minute of coyote.

I have been using the 1.52 for trim length.

 

[eleaf]

Re: Grendel loading data?

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: PittsDriver</div><div class="ubbcode-body"> <div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: DRA-M40A1</div><div class="ubbcode-body">AA2520 is THE powder for 123s.</div></div>

Agreed even though it's a pain to meter and the load is compressed. It's all I'm running in my Grendel.

RT </div></div>

Discovered the compression last night as I was trying to pull some bullets (this was part of an initial loading sequence that involved BR primers rather than SR Magnum primers) and trying to pour the powder out. Had to tap cases VIGOROUSLY in order to get it all out.

 

[eleaf]

Re: Grendel loading data?

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: TacticalJ</div><div class="ubbcode-body">So how about this one! Any of you guys ever resize 7.62X39mm (SKS) brass to 6.5G? I was reading about it and they say that the brass has to be fire formed after resizing to get the angle of the neck right. Anybody done that and if so, exactly how did you go about it? According to what I was reading, you put a "light" load in the case and simply fire it in the gun. Then bang your brass is GTG. I am wondering what a "light" load is? Is it simply a few grains less or would a guy just put 10-15grs in a case and call it good? I hate to waste bullets to do this, so I am wondering if a guy could load a few grains less then normal, say 20-24grs and be ok with firing the round like that. I don't know, but I have some SKS brass around and I resized it to 6.5. I guess I'm gonna have to try it and see what happens.

Another question I have is case length. Every site that I go to has a different max/min case length listed. AA says 1.526-1.520 and my virgin Hornady brass is in the 1.515 neighborhood. Also the SKS brass measured in the same 1.515 neighborhood after resizing. Any input on this or is just what will fit and function in your rifle?
Thanks Jason </div></div>

I forgot where I read it at this moment, but addressing this exact issue (multiple trim length suggestions) they suggested 1.515 as the trim length.

 

[jasonZ]

Re: Grendel loading data?

well honestly, I figured if Hornady sent it out that way, there was nothing wrong with it. Thats where I was going to base my starting point at anyway pretty much. Appreciate the info on that thouh leaf.