0.1 MOA with load development test

[DavidK]

I recently had Adam Busse, from Gunware.net, build me a 300 Norma Mag rifle. I used a Defiance Machine Deviant Tactical action, Bartlein 1:8 twist barrel and Trigger Tech trigger. It is sitting in an Accurate Mag chassis. Test was shot on a bench with bipod and rear bag.

I worked up a load test with Berger’s 230gn bullet and Retumbo powder. The 85.7gn turned in a 0.1MOA group!!

 

[Rthur]

Good shootin'
Be interesting to see what the vertical of that load is at 1k and beyond.

R

 

[6brshooter]

Nice. That is a pretty narrow accuracy window. Went from ok, to awesome, to ho hum.

 

[garandman]

Well done ! And nice looking gun.

300 Norma Mag intrigues me as my 338 Norma was one awesome shooter.

But I'm getting too old / wussy for magnum guns to beat me up.

 

[Ledzep]

Now put 10 in a group.

 

[Steel head]

Now put 10 in a group.

This.
If it’s repeatable it’s awesome

 

[Bertoli888]

Nice shooting! Any chance in sharing your hand loading practices (dies, anneal, brass prep, neck tensions)?

 

[Precision Underground]

Love me some 300 Norma. I would load more in the 87gr window and do it again. It’s unlikely that a less than 0.5% charge in either side would make that much difference. When you are loading .223 a 0.4gr charge difference is significant. When loading 87gr it’s really not significant. I think it will shoot but I would not be convinced in the load yet. My Norma has a charge window of about 1.5 grains where it shoots. My groups really shrank when I jammed the 230s into the lands. It’s a 3/8 moa gun.

 

[deersniper]

3 or 5 shot?

 

[Bertoli888]

At the end of the day, what you see in the target always is right. Great shooting, I be happy with 25% of that target!

 

[Gossett6MM]

Does that mean it's a 1/10th minute gun?

 

[deersniper]

I have a gap that is a .09" rifle with black hills factory ammo

 

[patriot07]

Nice. That is a pretty narrow accuracy window. Went from ok, to awesome, to ho hum.

I agree. I'd test that one again for sure with those type of results beside it. Nice group for sure, but considering the ones on either side of it, I'd make darn sure that wasn't a fluke before I loaded up a bunch of rounds with it.

 

[spife7980]

I agree. I'd test that one again for sure with those type of results beside it. Nice group for sure, but considering the ones on either side of it, I'd make darn sure that wasn't a fluke before I loaded up a bunch of rounds with it.

I disagree. I’d probably hang the rifle up with that target and never touch it again

 

[6brshooter]

5rds

or 10rds.....or it doesnt count. That's what I've learned on the hide.

 

[6brshooter]

At the end of the day, what you see in the target always is right. Great shooting, I be happy with 25% of that target!

Not necessarily, I've saw loads that looked pretty good but could not repeat one stellar performance. Statistics bare that out and it takes several 5 and 10rd groups before I say "this is the load"...

 

[patriot07]

I disagree. I’d probably hang the rifle up with that target and never touch it again

I had one group like that with my Savage 10VT and factory 168 FGMM. Got a picture of it somewhere, so I agree 100% with framing it. The rifle was normally around .5-.7 MOA with that lot of factory ammo, but especially with 3-shot groups, the odds of an outlier small group are not that impossible. Still an awesome group. But don't count out statistics and probability when you're doing load development.

 

[Srgt. Hulka]

Nice shootin there David K.


Well, I was going to post one of my groups, but damn, y’all are making feel bad. Screw it. I’m gonna post it anyway. Shot this today at 100 yards during load development. 5-round group. 6.5 creedmoor, 140gr ELD-M, 42.2gr. of H4350. Yes, I yanked one.

 

[just browsing]

Good shooting DavidK! Looks like the gun will be a keeper.

Rest of y’all are a buncha amateurs.

5er...

 

[Ranger188]

Everyone is going to post their best groups. True, you need to repeat this or very close a few times before you can call it a great load.
Was it a great group, yes it was, very good shooting. As for a great load, time will tell.
This is my best 4 shot group with a 6br. Sub.1 it will do this in 3 shots at least once a week
Thought the same thing, should stop shooting it and save it, but whats the fun in that. NONE
Just to add, all my groups are off a Atlas bipod and rear bag. Shoot as you would normally.

 

[Precision Underground]

Feelin like arfcom up in here with all these zoomed in and cut out 3 shot groups. I think one guy even had a flyer covered up with his calipers that we’re measuring his group lmao.

 

[steve123]

It's always exiting shooting a wallet group, isn't it! Got mine in the pocket right now, a .174 5'er. That was out of my first 6x47L barrel in my old MAK tubegun repeater. Lost count on the 3'ers that were smaller when checking zero.

Kinda funny but half the groups I shoot now with my 6mmBR are 5 touching, something my 6x47's wouldn't produce, but I haven't shot smaller than mid .2's yet with it.

What turns my crank is small vertical at a long distance, got 4.5" vertical for 12 shots at 1025Y with the 6mmBR which was awesome!!!

^^^ all the above off the Harris.

The 6mmPPC single shot bench rifles I had were just silly, the worst group I shot when working the load up was 1/2" and low .2's were common, that's 5'ers, eh that's to be expected with them off a proper rest. Actually after a while it's boring which was half the reason I sold them.

 

[deersniper]

5rds
View attachment 7091659or 10rds.....or it doesnt count. That's what I've learned on the hide.View attachment 7091661

Impressive!

 

[Steel head]

My last Shilen 260 Prefit in my Savage.

That was a awesome barrel.
5 shots of course.

 

[Bertoli888]

With all these wonderful targets above, are we in the golden era of Tactical rifle accuracy?

 

[Steel head]

With all these wonderful targets above, are we in the golden era of Tactical rifle accuracy?

I call it selective accuracy development.

 

[deersniper]

With all these wonderful targets above, are we in the golden era of Tactical rifle accuracy?

All these cherry picked groups don't mean a whole lot

But

Hell yeah we are in the best times so far to be a precision shooter. Look at the factory ammo and factory rifles available to today's shooter, compared to 20+ years ago.

 

[6brshooter]

How about 4 different loads? Lower left was first group, first shot was low. It was me or bipod settling in gravel. Old aiae with a well worn tooley 6.5creed barrel, about 1800 rds in

 

[Srgt. Hulka]

How ‘bout two 10-shot groups at 50 yards with a 10/22.
That’s all I got.

 

[BigTex]

Zoom those cameras out boys.

 

[6brshooter]

Zoom those cameras out boys.

I figure if a guy can put 4 or 9rds in a ragged hole and shows 1" or more target around group, it's safe to say the 5th or 10th rd is in there also, lol.

 

[Spblademaker]

5rds
View attachment 7091659or 10rds.....or it doesnt count. That's what I've learned on the hide.View attachment 7091661

The UPS guy never had a chance.

 

[Terry Cross]

Load more of the same exact load you fired your tiny group with. Shoot 3 or 4 more groups of that combination back to back and post the target in this thread. My money is that your agg. will be right with the other groups on your original target that had multiple groups.

Not knocking your ability or saying anything bad about your rifle. Just saying that zero conclusions should be drawn from that single group.

./

 

[Ranger188]

The OP was trying to show off a great group out of a new rifle.
Nice job, and really since it was a 300 Norma mag. Your on the right path with your shooting
and loading. Don't let anyone take away from that group.
Hopefully it will repeat it's self again sometime soon.
Now David, take that bad boy and bang some steel out past 1000 yds. and have fun with it.

 

[_Raining]

How many points do you get awarded in a competition for showing a .1 MOA wallet group?

Don't get me wrong, some people can pull off some crazy shit consistently but I wonder how many "sub 1/3 MOA all day" people are out there winning competitions.

 

[Ranger188]

I'm pretty sure a 300 Norma mag. isn't being used in a local 600 yd match.
Maybe he's an accomplished comp. shooter and just wanted to post a nice
group he shot with his new rifle.
The haters are usually the people that "can't" and feel better about themselves if they
bash someone else. Not everyone here can compete in matches... Now he might not post anymore cause he got beat up by a few.
This is the internet and you need to have a little thicker skin and any ass can say what he
wants from his parents basement.
Have we turned into a bunch of liberal Dems here.
Just my 2 cents.
This is what the monitors are complaining about

 

[Hondo64d]

Here’s two consecutive ten-shot groups from my Beanland 6.5 Creedmoor.

John

 

[hafejd30]

I shot a 1 hole group the other day. Not joking, it measured .00” center to center. Fired the 2nd round and fucked it up! Maybe next time...

 

[BigTex]

Here’s two consecutive ten-shot groups from my Beanland 6.5 Creedmoor.

John

View attachment 7092723

Both of the rifles Jon has built for me are lasers.

 

[Hondo64d]

Both of the rifles Jon has built for me are lasers.

Jon is putting together my hunting rig for me now. Origin, Bartlein #3, adjustable CF Game Scout and APA flush BM. Im expecting good things. I’m pretty excited about it.

John

 

[BigTex]

Jon is putting together my hunting rig for me now. Origin, Bartlein #3, adjustable CF Game Scout and APA flush BM. Im expecting good things. I’m pretty excited about it.

John

You wont be disappointed, he's a good dude and a hell of a rifle builder.

 

[Big Ern]

Beanland is the man. He builds lasers, that’s for sure. Enjoy.