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6.8 SPC in a Martini cadet? (Read 7971 times)

DinoinReno Ex Member	6.8 SPC in a Martini cadet? Dec 28^th, 2008 at 2:12am	Print Post
	What do you think of this in a small (light) diameter 24" to 26" barrel for coyote to deer size hunting? Dino in Reno


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DoubleD Oldtimer Offline Posts: 766 Location: Edmond Joined: Feb 14^th, 2006	Re: 6.8 SPC in a Martini cadet? Reply #1 - Dec 28^th, 2008 at 10:32am	Print Post
	Use a 30-30 case and make a dummy round. (30-30 is a rimmed .30 Remington. Make a stub barrel and chamber it for 6.8 SPC and cut a rim relief for the 30-30 rim. See if the dummy round will fit. My bigger concern is pressure. What is the nominal pressure of this cartridge.

	Douglas, Ret.
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EdBu Full Member Offline Posts: 108 Location: SW Washington Joined: Jan 13^th, 2008	Re: 6.8 SPC in a Martini cadet? Reply #2 - Dec 28^th, 2008 at 12:48pm	Print Post
	Please enlighten me... Is the 6.8SPC a 30 Rem or 30-30 necked to about 7mm? What pressures are we looking at, and is there any marked difference between it and a 7-30 Waters (which works nicely in a cadet action)? Ed


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DoubleD Oldtimer Offline Posts: 766 Location: Edmond Joined: Feb 14^th, 2006	Re: 6.8 SPC in a Martini cadet? Reply #3 - Dec 28^th, 2008 at 1:15pm	Print Post
	Ed I think the 6.8 uses .270 bullets (.277). Do like the idea of the 7-30 Waters in a small martini action and have been threatening to build one for years.

	Douglas, Ret.
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DinoinReno Ex Member	Re: 6.8 SPC in a Martini cadet? Reply #4 - Dec 28^th, 2008 at 3:15pm	Print Post
	The 6.8 SPC has the advantage of factory loads and brass. The "black rifle boys" will keep it available. It is based on the .30 Remington case necked down to .270 (really .277), and is rimless. It is .417 at the rim, .421 at the base, and .401 at the shoulder. Factory loads run 115 gn at 2600 fps. Remington said the pressure is 55,000 psi MAP. It was designed to work in the M4 so think .223 pressures. It is shorter than the 7mm Waters, and rimless but they close cousins Thanks for the interest and suggestions, Dino in Reno


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DoubleD Oldtimer Offline Posts: 766 Location: Edmond Joined: Feb 14^th, 2006	Re: 6.8 SPC in a Martini cadet? Reply #5 - Dec 28^th, 2008 at 4:57pm	Print Post
	55000 is kind of pushing it on little Cadet. The barrel Tenon is only 3/4 inch and that has threads cut in it. The dimensions in the critical areas are similar to the .225 Winchester. The .225 has a repution of bulging the thin chamber walls...mine did. My 219 Donaldson Wasp never had a problem. I think I would think twice about the 6.8 in the cadet. Did you discuss this cartridge with Bob Snapp?

	Douglas, Ret.
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DinoinReno Ex Member	Re: 6.8 SPC in a Martini cadet? Reply #6 - Dec 28^th, 2008 at 5:26pm	Print Post
	Not yet, if this is a no-go then maybe the 6.5 or 7mm TCU, they are based on the 223 case. This is why I like forums like this, good info from people who have been there, or at least close to there:-) Oh, and then tell me where the speed traps are. Dino in Reno


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38_Cal Frequent Elocutionist Offline Posts: 2253 Location: Montezuma, Iowa Joined: Apr 27^th, 2005	Re: 6.8 SPC in a Martini cadet? Reply #7 - Dec 28^th, 2008 at 9:02pm	Print Post
	Bob Snapp is a fan of the 7-30 Waters in the Cadet. (His personal hunting rifle is in that caliber.) Bonus is that there's no extraction problems with the rimmed case. Brass is fairly well available, as are dies and components. David Montezuma, IA

	David Kaiser Montezuma, IA
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QuestionableMaynard8130 Frequent Elocutionist Offline Posts: 4144 Location: Benton Harbor MI Joined: Apr 17^th, 2004	Re: 6.8 SPC in a Martini cadet? Reply #8 - Dec 28^th, 2008 at 10:21pm	Print Post
	What about a 25-35 necked up to 6.5/264----too long for a cadet?

	sacred cows make the best burger
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TED338 Participating Member Offline Posts: 20 Joined: Nov 25^th, 2008	Re: 6.8 SPC in a Martini cadet? Reply #9 - Dec 28^th, 2008 at 10:24pm	Print Post
	Give the 6.5 Arisaka a look, pressure is around 38K psi w/140 grs and you can get factory ammo. Very comfortable in a light cadet.


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DinoinReno Ex Member	Re: 6.8 SPC in a Martini cadet? Reply #10 - Dec 29^th, 2008 at 12:39am	Print Post
	If Mr. Snapp says 7mm Waters, thats what It will be, most likely Now to start the build fund. "More toys, one toy at a time" Dino in Reno


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DinoinReno Ex Member	Re: 6.8 SPC in a Martini cadet? Reply #11 - Dec 31^st, 2008 at 2:39am	Print Post
	After a bit of online "research" the "256 GNG" sounds like a posibility. It's a .357 Maximum necked to .25, a stretch .256 Winchester Magnum. It would have more room for powder and longer bullets. Its rimmed. .375 base and a .433 rim vs .353 and .405 on the .310. Or maybe live with a new barrel in 32-20 It is easer to find than .310 Cadet... Dino in Reno


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MartiniBelgian Frequent Elocutionist Offline Posts: 1730 Location: Aarschot Joined: Jun 7^th, 2004	Re: 6.8 SPC in a Martini cadet? Reply #12 - Dec 31^st, 2008 at 2:58am	Print Post
	I can vouch for the 32-20 (or rather 30-20) being a very nice round in these little rifles, and very versatile too: you can go all the way from low-power gallery loads at modest velocities to heavy boat-tail spitzers (well, 155gr for me) for longer-range shooting. And with a good barrel, they are scarily accurate...


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