408 ct

smokingunn

smokingunn

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Yes i am bringing it up again, for those who know, have components become more available? How ugly is barell life?, i see stiller is now making an action designed for the cartridge, they wouldn't build something so specific if it was not starting to catch on right? I know the 50 does it better but i do like different, but just not impossible to find components. Any info anyone has would be greatly appreciated.
 
Not only do we have several 408 Cheytac caliber rifles in stock, but also carry the dies and components to make shooting them possible.
Barrel life is more dictated by how hot you allow the barrel to get.
If you sat down and ran off 500 in an hour or 2 pretty damn short barrel life I would expect.
If shot at a precision rifle is supposed to be shot, no reason to not see several thousand rounds.
The necked down variants are a different thing. From reliable sources in the US the 408 necked down to 338 gets under 1000 rnds before the barrel is cooked, the 408 necked down to 375 a bit more but not by much.
 
I wouldn't mind a 408 either. Does anyone carry a good ULD type bullet in Canada? Who makes a repeater action for it? and Is it worth it to get over a 50?
 
TJW said:
I wouldn't mind a 408 either. Does anyone carry a good ULD type bullet in Canada? Who makes a repeater action for it? and Is it worth it to get over a 50?
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"Not only do we have several 408 Cheytac caliber rifles in stock, but also carry the dies and components to make shooting them possible."


Yes`we carry a good ULD bullet for 408
Yes we build 408s in a repeater, check our website.
 
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TJW said:
Oh good to know, Cheytac makes the 408 round like it the best thing ever to be developed
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It is called marketing. Compare your uber wonderful whatever to the lowest common denominator of whatever you are comparing to.
In this case they used a custom rifle made to match tolerances match prepped ammo and compared it to an M2 shooting military ball ammo designed for a machine gun.
A match built 50 can be just as accurate as any other match built caliber and as long as the caliber has high BC good quality bullets the rifles should perform similarly.
Physics is immutable. A heavier bullet is longer and has a higher B.C. and will loose velocity and energy at a slower rate than a lighter 1 will.
 
TJW said:
doesnt a 408 stay supersonic longer than a 50?
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Already answered ("no"), in particular Rick's most recent posting goes straight to the core of the matter "Physics is immutable. A heavier bullet is longer and has a higher B.C. and will loose velocity and energy at a slower rate than a lighter 1 will"

Another factor too, the .408 CheyTac is proportionately a bit smaller of a cartridge than the .50BMG is. The normalized case volume:bore size for the .408 is ".308-class", the .50BMG is ".30-06 class". This isn't a big difference, but basically the .50BMG is about 10% more "overbore" than the .408 is. That won't give the .50 a 10% more muzzle velocity boost, but it will be worth 4-6% (the same velocity edge that a .30-06 has over a .308 Win).

To that you have to multiply by the ratio of the calibres, which is roughly 5/4. So the .50BMG will gain about 25% over the .408 simply by virtue of it being 25% bigger.

All other things being equal (chamber pressure, barrel length in "calibres", rifle accuracy, bullet technology leve,l and bullet weight and length in proportion to bore size), the 50BMG will outperform the .408 by about 30%.
 
rnbra-shooter said:
Already answered ("no"), in particular Rick's most recent posting goes straight to the core of the matter "Physics is immutable. A heavier bullet is longer and has a higher B.C. and will loose velocity and energy at a slower rate than a lighter 1 will"

Another factor too, the .408 CheyTac is proportionately a bit smaller of a cartridge than the .50BMG is. The normalized case volume:bore size for the .408 is ".308-class", the .50BMG is ".30-06 class". This isn't a big difference, but basically the .50BMG is about 10% more "overbore" than the .408 is. That won't give the .50 a 10% more muzzle velocity boost, but it will be worth 4-6% (the same velocity edge that a .30-06 has over a .308 Win).

To that you have to multiply by the ratio of the calibres, which is roughly 5/4. So the .50BMG will gain about 25% over the .408 simply by virtue of it being 25% bigger.


All other things being equal (chamber pressure, barrel length in "calibres", rifle accuracy, bullet technology leve,l and bullet weight and length in proportion to bore size), the 50BMG will outperform the .408 by about 30%.
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What a great reply, that covers it perfectly
 
only upside to 408 I can see is as a step between 338 Lapua and 50 BMG in terms of the size the rifle would need to be. It would probably be possible to make a 408 a bit lighter than a 50 but that's just my current opinion.
 
rnbra-shooter said:
Already answered ("no"), in particular Rick's most recent posting goes straight to the core of the matter "Physics is immutable. A heavier bullet is longer and has a higher B.C. and will loose velocity and energy at a slower rate than a lighter 1 will"

Another factor too, the .408 CheyTac is proportionately a bit smaller of a cartridge than the .50BMG is. The normalized case volume:bore size for the .408 is ".308-class", the .50BMG is ".30-06 class". This isn't a big difference, but basically the .50BMG is about 10% more "overbore" than the .408 is. That won't give the .50 a 10% more muzzle velocity boost, but it will be worth 4-6% (the same velocity edge that a .30-06 has over a .308 Win).

To that you have to multiply by the ratio of the calibres, which is roughly 5/4. So the .50BMG will gain about 25% over the .408 simply by virtue of it being 25% bigger.

All other things being equal (chamber pressure, barrel length in "calibres", rifle accuracy, bullet technology leve,l and bullet weight and length in proportion to bore size), the 50BMG will outperform the .408 by about 30%.
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Well I believe I'm sold on the 50. What is the approximate cost per round if you hand load 750gr A-max?
 
TJW said:
Well I believe I'm sold on the 50. What is the approximate cost per round if you hand load 750gr A-max?
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We have not be legally able to have the 750 Amax bullets exported from the USA for several years now.
I don't want to hear about all the guys that can get them, it is smuggling and illegal. I have waaaay tooooo much to loose to engage in those games.

The closest is either a 750 gr Lapua or ABC bullet. There may be other small makes in Canada that also have offerings.

New brass is about $6.00 per casing, lapua bullet another $5.00, primer .60 and about $1.75 per round for powder
There is some 1 time fired brass kicking around if 1 looks and from time to time pulled FMJ bullets that will bring the costs down, but you get what you pay for in most cases.
 
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