Whats your 77smk 2000mr load?

[Jethro21]

Hey guys, not finding a lot of info on 2000mr real world results out there.

I just started development with cannalured 77smk, started with 24.0gr and worked up by .2gr to 25.6gr. I found that 24.6gr shot very tight, .5 moa. Strangely, .2gr over and under was significantly larger, around 1 moa, which kinda made me scratch my head.

25.6gr showed promise, but since that was already .4gr over Alliant's load data, I stopped there (no pressure signs). In what info I have found out there, I have seen guys using 1gr or more than book (I know manufactorers always list low). So, I am gonna load some up a little higher, maybe up to 26.5gr if no pressure signs.

Could anyone give me their personal loads for 77smk and 2000mr?

Thanks,
Jethro

eta- rifle info, Ar15 with 18" black hole weaponry barrel, loaded to mag length.

 

[cavemanlrrp]

Obviously this is not a recommendation. Only personal experience with one particular rifle.
Rifle, AR 15, 20'' FN CHF barrel, 5.56 chamber.

Can't say about 77 smk. Using 77 Nosler cc's. over 2000mr, LC brass, cci 41 primmer, max mag length in AR stoner mags 2.26+, BTO 1.8860. ETA; with my tools.
After 25.0 gr. went up in .1 gr increments.

Found good loads at 25.4gr ave. vel 2623,
26.0gr ave. vel. 2693,
26.7gr ave. vel. 2790 . No pressure yet. Am going to look higher.

Just started working up a load for Berger 80.5s (over mag length) with 2000mr. went up to 25.0 gr.. No pressure, will look higher.

Best
caveman

 

[Pinecone]

I found that 24.6gr shot very tight, .5 moa. Strangely, .2gr over and under was significantly larger, around 1 moa, which kinda made me scratch my head.

Read - OCW Overview - Dan Newberry's OCW Load Development System

 

[bruddah]

Hey guys, not finding a lot of info on 2000mr real world results out there.

I just started development with cannalured 77smk, started with 24.0gr and worked up by .2gr to 25.6gr. I found that 24.6gr shot very tight, .5 moa. Strangely, .2gr over and under was significantly larger, around 1 moa, which kinda made me scratch my head.

25.6gr showed promise, but since that was already .4gr over Alliant's load data, I stopped there (no pressure signs). In what info I have found out there, I have seen guys using 1gr or more than book (I know manufactorers always list low). So, I am gonna load some up a little higher, maybe up to 26.5gr if no pressure signs.

Could anyone give me their personal loads for 77smk and 2000mr?

Thanks,
Jethro

eta- rifle info, Ar15 with 18" black hole weaponry barrel, loaded to mag length.

Not telling you to do this.....

But....

That barrel is rated for 5.56. Chances are the top loads you are looking at are for .223 ...... You can go higher (theoretically if no pressure signs).

Also the BHW barrels have a lower pressure than standard rifling because the are polygonal rifled. Chances are you can go higher IF you think you are close to an accuracy node....