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 Post subject: Re: 7 Mashburn tomorrow
PostPosted: Tue Sep 10, 2019 6:14 pm 

Joined: Sun Dec 24, 2006 12:20 pm
Posts: 29292
Location: Northern Virginia
H1000 is always good for me as well. I think Joel just wanted to test the waters a bit with Retumbo and see how his speeds fell out.

I could use nothing but H1000 in mine and be a happy camper.

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 Post subject: Re: 7 Mashburn tomorrow
PostPosted: Tue Sep 10, 2019 6:24 pm 

Joined: Sun Jun 05, 2011 10:01 am
Posts: 1271
Location: USAF base somewhere
Yep. Nothing against H1000. I had more experience with Retumbo and RL26 than H1000 in the other Mashburn so started there.

The Retumbo load with 160 AB shot pretty well today, about an inch for seven or eight shots.

I have this feeling that it’s just as much the nut behind the trigger, not that I’m complaining about an inch group size. But some of those shots just stack up and cloverleaf, and there’s the occasional flier a touch high and right. Maybe cheek weld, trigger pull, something. Load is totally ready to go hunting. I need to shoot it at distance and see how it does, I’m confident.

The rifle will get your attention a bit. 35 shots yesterday, 15 today. After shot 2 today I had a pain in my head, but it subsided. I want to go play with a 22 lr!




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 Post subject: Re: 7 Mashburn tomorrow
PostPosted: Tue Sep 10, 2019 6:29 pm 

Joined: Sun Dec 24, 2006 12:20 pm
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Location: Northern Virginia
Nice. Sounds like you found a winner.

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 Post subject: Re: 7 Mashburn tomorrow
PostPosted: Tue Sep 10, 2019 7:04 pm 

Joined: Sun Jun 05, 2011 10:01 am
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Location: USAF base somewhere
This is what I really want to make work!

Image




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 Post subject: Re: 7 Mashburn tomorrow
PostPosted: Wed Sep 11, 2019 2:57 am 

Joined: Sun Dec 24, 2006 12:20 pm
Posts: 29292
Location: Northern Virginia
How’s it working Joel?

Looked at those a few times.

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 Post subject: Re: 7 Mashburn tomorrow
PostPosted: Thu Sep 12, 2019 8:35 am 

Joined: Sun Jun 05, 2011 10:01 am
Posts: 1271
Location: USAF base somewhere
I'll come back to the Harrell's.

I abandoned something about the Retumbo. Great potential...sometimes. Like in this photo shot at 300...

Image

Great 3 shot group, and a big flyer. No idea what's causing that. Could be the brass, something else. Great speed, something is touchy.


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 Post subject: Re: 7 Mashburn tomorrow
PostPosted: Thu Sep 12, 2019 8:47 am 

Joined: Sun Jun 05, 2011 10:01 am
Posts: 1271
Location: USAF base somewhere
I started over with RL26 yesterday. I shot 10 rounds from 69.2 gr to 71 gr over the chrono, 0.2 grain increments. I also switched brass (to a higher quality brass) and primers back to CCI250s (again, just because).

7 Mashburn
RWS Brass
RL26
CCI250 primer
160 AB 2.913 CBTO (around 3.6 OAL, 0.05 off lands)

Velocity looked like:
69.2 gr 3140 fps
69.4 gr 3136 fps
69.6 gr 3148 fps
69.8 gr 3150 fps
70.0 gr 3148 fps
70.2 gr 3156 fps
70.4 gr 3164 fps
70.6 gr 3168 fps ejector scuff?
70.8 gr 3184 fps
71.0 gr 3186 fps

The ejector scuff was there, but primer pockets were tight, so not a big concern.

Then I loaded up 10 rounds with 69.9 grains RL26, RWS brass, CCI250, 160 AB at 2.913 CBTO.

Here it is at 100 yards:
Image

at 300 yards. 5 inches right. Wind is stiff this morning!:
Image

at 400. I only had 3 rounds left. First one not on steel, the wind pushed it too far right according to a spotter next to me. For the first shot I held at the left edge of the steel plate. For these next two shots I held about (guessing here) 4 inches left of the plate.
Image

Hopefully I'll shoot it again before the season, but I feel really good about no flyers in 10 rounds, shot at 3 different distances.

And any of you that know me well know I'm really a fly fisherman disguised as an elk hunter. Tomorrow hopefully headed to fish Northgate Canyon on the North Platte River!


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 Post subject: Re: 7 Mashburn tomorrow
PostPosted: Thu Sep 12, 2019 1:38 pm 

Joined: Sun Dec 24, 2006 12:20 pm
Posts: 29292
Location: Northern Virginia
Nice Joel! The Mash looks ready to hunt to me.

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