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6.5/300WSM and giving "props"

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Unread 09-25-2003, 07:17 AM
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6.5/300WSM and giving "props"

Well I figure that given the "hessitant acceptance" on other boards we need to give credit where credit is due when "one of our own" deserves it...

I met Chris Matthews through this board and after several e-mails and some question and answer sessions.. (He even called ME to discuss several things.) I decided to have him build a rifle for me. I had a Win. LA and thought .. Well, I've wanted to try a 6.5/300WSM so why not...
Going into this venture with Chris, he patiently answered my numerous and annoying e-mails ( DC you know how I can get) if I wasn't asking one thing about this, I was asking another about that...
We knew going in that this was a guinea pig project and not sure how this fairly new wildcat cartridge/project would turn out...
Chris took care of all the calls to Redding for dies etc. I feel there isn't anything he wouldn't have done to make this project work. I can't say enough about his professionalism, patience, craftmanship and promptness!!

Ok to the particulars...

Win Mod. 70 LA Blue Printed etc. Mike Rock #6 fluted 28" 8 twist barrel, Holland quick discharge break. HS Stock, Tuned stock win trigger, Badger ordinance base and rings and she wears a 8.5-25 LR lupy...

After numerous powders and a few kinds of bullets.. ( afterall there isn't much data out there.. ) and another flurry of e-mails to Chris, I found a powder/bullet combo or 2 that works....

I'm using RL 25 and Berger 140 VLD's and I also had some good results with H4831SC...

I am going to try 142 SMK's again as well as Lapua Scenars...

anyway.. my point is that working with Chris Matthews was more than a pleasant enjoyable experience. TOP quality craftsmanship and good to his word! I have send 2 rifles to him and another will be on its way next week and we are making plans to build another..

OK for results... a picture is worth a 1000 words right.....

6.5/300 WSM

The group..5 shots, RL25, Berger 140VLD, 3100 FPS...

[ 09-25-2003: Message edited by: *WyoWhisper* ]
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Unread 09-25-2003, 09:04 AM
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Re: 6.5/300WSM and giving "props"

Looks good-- I've already decided to do my MRC action in 6.5 WSM when it arrives next month--looks like you just save me alot of work...Thanks....
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Unread 09-25-2003, 09:16 AM
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Re: 6.5/300WSM and giving "props"

When ya get it shoot me an e-mail... got lotsa data.... [img]images/icons/grin.gif[/img]
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Unread 09-25-2003, 09:22 AM
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Re: 6.5/300WSM and giving "props"

I'll be giving Chris and George a call as soon as the action arrives.. I'll let you know when I get it together...
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Unread 09-25-2003, 12:55 PM
Silver Member
Join Date: Jul 2002
Location: France
Posts: 390
Re: 6.5/300WSM and giving "props"

just a question

6.5/300 WSM is in the water capacity class of the 264 WIN mag , in a 264 WIN mag than not really difficult to get 3200 fps with a 140 gr in a 28 inch so why not use more the potential of the 6.5/300 WSM to reach highter velocity

good shooting

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Unread 09-25-2003, 01:16 PM
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Re: 6.5/300WSM and giving "props"


I ran 142 SMK's outta it at 3400 safely... but 2900 - 3100 seems to be where the 140 gr "ish" bullets like to be....

My most accurate load was at 3100 fps... so that where I'll keep her until I can do more testing....

I have 1000 ft. lbs. at 1000 yards at 3100 fps....
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Unread 09-25-2003, 02:56 PM
Platinum Member
Join Date: Jun 2001
Location: Palmer, Alaska
Posts: 2,539
Re: 6.5/300WSM and giving "props"


Glad to see another 6.5wsm. Yours is shooting better than my dads if you can get those tight of groups consistantly! He was messing around with his loads above 3150 fps, until I told him what Ken Markle was telling me about bullet base deformation.

Ken said that once you get to the 3150 fps mark with most 6.5 bullets, the base will deform from the pressure and thus cause the lead to push forward and deform the ogive... large inaccuracies are a direct result. This was tested and verified in the bullet forming dies as to what level of pressure deformed the bullets bases.

He's loading to levels under 3100 now, we'll see how she shoots down lower for a change.

He's using RL25 and had the best luck with it too. It's the best at filling the case up and unless I had to, I wouldn't pursue 4831 for lack of density. The lower the charge density, the farther peak pressure is moved toward the muzzle and bullet upset gets worse. I'd use the regular 4831 to better fill the case if having to use it, the SC has a lower bulk density and will just make it worse when trying to fill up the case better, even tho it does meter smoother.

The 140 Bergers, and 142 SMK's shoot the best in his 6.5wsm, with the nod going to the SMK.

Did you use the 270wsm or the 300wsm length case, or the longer 7mm case to base it off of? Dad uses 270wsm brass for his.

Wow, that's a nice small group!

What load are you getting 3100 with RL25, and what's your OAL with the Berger too.

We were getting 3130 fps with the Berger load and RL25 we originally started working up from, and psi was 55,000 psi on the Oehler 43 with 66.0gr at 3.1 OAL. Are you running the Bergers into the lands?

We got up to 68gr and fired 3 rounds there, pressure was 58,900 on the first shot but rose up and was 67,800 by the last shot, 3200 on up to 3300 fps. Toward the higher end on a few loads, we saw this trend of rapidly climbing MV and psi. It never has been present when backed off a grain or two tho. His has a 30" tube.
Brent Moffitt
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