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7x57 to 284 win
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Picture of Mike_Dettorre
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I am assuming that since there is only about .210 difference in case length and the 284 win is fatter than a 7x57 that a barrel could be easliy re-chambered from 7x57 to 284 win?


Mike

Never under estimate the internet community's ability to reply to your post with their personal rant about their tangentially related, single occurrence issue.



What I have learned on AR, since 2001:
1. The proper answer to: Where is the best place in town to get a steak dinner? is…You should go to Mel's Diner and get the fried chicken.
2. Big game animals can tell the difference between .015 of an inch in diameter, 15 grains of bullet weight, and 150 fps.
3. There is a difference in the performance of two identical projectiles launched at the same velocity if they came from different cartridges.
4. While a double rifle is the perfect DGR, every 375HH bolt gun needs to be modified to carry at least 5 down.
5. While a floor plate and detachable box magazine both use a mechanical latch, only the floor plate latch is reliable. Disregard the fact that every modern military rifle uses a detachable box magazine.
6. The Remington 700 is unreliable regardless of the fact it is the basis of the USMC M40 sniper rifle for 40+ years with no changes to the receiver or extractor and is the choice of more military and law enforcement sniper units than any other rifle.
7. PF actions are not suitable for a DGR and it is irrelevant that the M1, M14, M16, & AK47 which were designed for hunting men that can shoot back are all PF actions.
8. 95 deg F in Africa is different than 95 deg F in TX or CA and that is why you must worry about ammunition temperature in Africa (even though most safaris take place in winter) but not in TX or in CA.
9. The size of a ding in a gun's finish doesn't matter, what matters is whether it’s a safe ding or not.
10. 1 in a row is a trend, 2 in a row is statistically significant, and 3 in a row is an irrefutable fact.
11. Never buy a WSM or RCM cartridge for a safari rifle or your go to rifle in the USA because if they lose your ammo you can't find replacement ammo but don't worry 280 Rem, 338-06, 35 Whelen, and all Weatherby cartridges abound in Africa and back country stores.
12. A well hit animal can run 75 yds. in the open and suddenly drop with no initial blood trail, but the one I shot from 200 yds. away that ran 10 yds. and disappeared into a thicket and was not found was lost because the bullet penciled thru. I am 100% certain of this even though I have no physical evidence.
13. A 300 Win Mag is a 500 yard elk cartridge but a 308 Win is not a 300 yard elk cartridge even though the same bullet is travelling at the same velocity at those respective distances.
 
Posts: 10096 | Location: Loving retirement in Boise, ID | Registered: 16 December 2003Reply With Quote
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Picture of Toomany Tools
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Information I have puts the difference at .074", meaning that if you used a .284 reamer in a 7mm Mauser chamber you'd end up with a neck that is quite a bit long for spec. Probably not a big deal to most.


John Farner

If you haven't, please join the NRA!
 
Posts: 2939 | Location: Corrales, NM, USA | Registered: 07 February 2001Reply With Quote
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Picture of D Humbarger
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Mike to clean the neck just set the barrel back a thread or two depending what the thread pitch is.



Doug Humbarger
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Tonkin Gulf Yacht Club 72'73.
Yankee Station

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Posts: 8346 | Location: Jennings Louisiana, Arkansas by way of Alabama by way of South Carloina by way of County Antrim Irland by way of Lanarkshire Scotland. | Registered: 02 November 2001Reply With Quote
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I show the cases as .065" shorter going by the lengths 4D has on his site. As to the neck I see that as no big deal. If you are trying to seat your bullets close to the lands it makes them further away.


As usual just my $.02
Paul K
 
Posts: 12881 | Location: Mexico, MO | Registered: 02 April 2001Reply With Quote
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I rechambered my 7 x 57 many yeas ago, and found it "not worth" the trouble.

Making a 280 Rem out of it is easier and makes more sense.


Remember, forgivness is easier to get than permission.
 
Posts: 3993 | Location: Hudsonville MI USA | Registered: 08 June 2000Reply With Quote
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