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Quarter bore and 6.5mm wildcat ???s

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Unread 10-24-2004, 10:12 AM
Junior Member
Join Date: Oct 2004
Location: Jackson, TN
Posts: 11
Quarter bore and 6.5mm wildcat ???s

I have the same condition that I suspect everyone else here has, that is that I cant seem to amass enough rifles in my safe. I am curious about possibly having a custom built in a smaller bore VERY fast round for "farts n giggles" (aint that all the reason we need to get another gun?).

I absolutely love the .257 Wby Mag but I like something different and have always been of the type that "if 2 aspirins are good then 4 are 2ce as good"! So I wonder about having a turbocharged quarterbore or possibly even a 264 pill launcher. I know from personal experience that the Lazzeroni Scramjet (.257) isnt as fast as the Warbird or the Firebird yet they all three share the same case (essentially a straightwalled .416 Rigby). That tells me that it is overbore. Would a 7STW case or an opened up 300 Wby case etc push either a .257 or .264 100+grain pill into the 4k fps realm? What about gettin a .243 85-100 grain Xbullet into that realm as well?

Speed kills and I have NEVER killed anything to dead,
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Unread 10-26-2004, 05:20 PM
Junior Member
Join Date: Aug 2004
Location: Colorado
Posts: 4
Re: Quarter bore and 6.5mm wildcat ???s

Several years ago, probably in Shooting Times magazine, possibly Guns & Ammo.........one of the magazines' regular writers did article on a .257 Weatherby that he had built. I think the author was Rick Jamison, not sure. Anyway, this particular rifle was built using "gain-twist" rifling. It was a delicious article.....just almost too good to be true, in terms of the velocity and grouping ability he got. The velocity was absolutely amazing, for the amount of powder burnt, and the barrel length.

I wish I knew of the exact source of that article, cuz I have often thought of it since reading it. I know when I read it, I thought to myself "If this rifle was for sale, I would buy it this second!"

Maybe one of our members can post details about the source of the article.

Lee Carkenord
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Unread 10-26-2004, 06:17 PM
Bronze Member
Join Date: May 2003
Location: VA.
Posts: 81
Re: Quarter bore and 6.5mm wildcat ???s

i read in a shooting times artic.about a 25 cal. hot tommali it was + 4000 may want to check it out
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Unread 10-27-2004, 01:22 PM
Silver Member
Join Date: Jul 2002
Location: France
Posts: 390
Re: Quarter bore and 6.5mm wildcat ???s

I use and design a 6.5/300 Yuma that a 264 win body in a 300 win mag to create a long neck case

with tight base and parallel throat that allow to reach 3350 fps with a 139/142 match bullet in a 30 inch barrel with no case vailability problem ( 300 win mag ) and good case ( any maker make 300 win mag ) neck is in 0.297 witch allow neck turning to get clearance

accuracy is very good at 1200 yards

good shooting

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Unread 10-27-2004, 09:24 PM
Bronze Member
Join Date: Oct 2004
Location: NC
Posts: 62
Re: Quarter bore and 6.5mm wildcat ???s

Been looking at a 6.5 STW myself. The data i've found so far shows a 140 gr. at about 3400 ft.
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Unread 10-27-2004, 11:20 PM
Platinum Member
Join Date: Jul 2003
Location: Central PA
Posts: 1,307
Re: Quarter bore and 6.5mm wildcat ???s

that would be the 257STW--go for it--barrelmakers are making new barrels everyday [img]images/icons/wink.gif[/img]
Check it Out!!--> Shoot the Smack The Smiley Match...and help AmericanSnipers.org
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Unread 10-28-2004, 01:25 PM
Writers Guild
Join Date: Jul 2001
Posts: 1,459
Re: Quarter bore and 6.5mm wildcat ???s

Have a visit to accuratereloading.com. They have very fun fast projects.

An STW or Ultra mag case and long enough barrel will certainly take the light pills to 4K. How accurately? who knows but it will get there in a hurry.

Been playing with a 6.5-06 and 140gr SST bullets. Only going 2975fps but LR performance is great. Take that same bullet and go 3200 to 3400fps and you are having some fun. Use a 1 in 9 twist and I am pretty sure that bullet will handle the trip.

Which brand of barrel are you planning on using? We should all buy some shares in that company :-)

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