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Old February 17, 2021, 08:41 PM   #1
stagpanther
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2 new builds to try

Things just sorta came together at the same time; McGowen sent me a new SS barrel in 270 wby mag (it looks great on the inside too), and I have a spare MDT chassis looking for a howa 1500/weatherby vanguard action, so I decided to take a chance on one of Brownell's Howa barreled actions (for which they are the exclusive distributers for) in 300 wm.

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Old February 19, 2021, 09:26 AM   #2
taylorce1
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Quote:
Originally Posted by stagpanther
I decided to take a chance on one of Brownell's Howa barreled actions (for which they are the exclusive distributers for) in 300 wm.
I mean why not! . I bought a Brownell's Howa 1500 barreled action in 6mm Creedmoor when they were $250 with free shipping. The way that rifle shoots, I'd not hesitate to try another. Nice rifles!
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Old February 19, 2021, 09:00 PM   #3
stagpanther
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The finishing on their metalwork is simply beautiful, the accuracy I think is still a notch below say a Mark 5's (Howa makes Weatherby's vanguards); but still very good for a production barrel, comparable I think to E A Brown's Shaw barrels.
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If you’re ever hiking in the woods and you get lost, just look up and find the brightest star in the sky and you’ll know which way space is.
I am NOT an expert--I do not have any formal experience or certification in firearms use or testing; use any information I post at your own risk!
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Old February 20, 2021, 05:37 AM   #4
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Right now I'm using Tubb's finishing bullets to smooth/polish the bores powered by IMR's enduron powders, first time I've used them on brand spanking new bores.
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If you’re ever hiking in the woods and you get lost, just look up and find the brightest star in the sky and you’ll know which way space is.
I am NOT an expert--I do not have any formal experience or certification in firearms use or testing; use any information I post at your own risk!
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Old February 24, 2021, 05:01 PM   #5
stagpanther
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I finished running the Tubbs finishing bullets through both rifles--but the 270 wby mag needs a replacement scope base before I can start shooting groups for development, so that is sidelined temporarily.

The howa 1500 300 win mag I finished bore polishing with the Tubbs finishing bullets yesterday, and I went out today and shot a quick two test groups with a combination I've never used in a 300 wm before, Berger's 200.2 gr hybrid target driven by H 4350. Unfortunately, by virtue of the 300 wm throat design and the bullet's sharp secant design I couldn't get close to getting the ogive near the lands--the cartridge would be so long it would fit neither the AICS magazine (which is actually very generous in COL length) or even the dimensions of the receiver. So I settled for a COL of 3.361.

Here is the very first group shot at 214 yds:



Other than checking the headspace and chamfering the case mouth, I didn't do any other equalizing/accurizing of the cases, and this turned out to be a big mistake. Upon chambering the 3rd cartridge there was notable resistance to closing the bolt, though not requiring all that much force to close it. I knew from past experience, though, the chances were good something was possibly applying a camming force on the bullet by the case neck/mouth. I called the shot as I took it a good one which I held pretty steady--it's the one that impacted far higher and to the right. The other shot outside the target orange circle with the 1 next to it I knew I pulled a bit as the shot broke and the impact with the #2 was from the second group. I mention all this because there's a very informative discussion going on in the Handloading portion of the forum in regards to bullet seating, OAL and effects on case dimensions.

The bullet seems pretty awesome, I like the idea that Berger using a portion of the sales from each box to support the US F-Tr team.
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__________________
If you’re ever hiking in the woods and you get lost, just look up and find the brightest star in the sky and you’ll know which way space is.
I am NOT an expert--I do not have any formal experience or certification in firearms use or testing; use any information I post at your own risk!

Last edited by stagpanther; February 24, 2021 at 05:11 PM.
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