Can you change rifle caliber by the load?

Discussion in 'General Rifle Discussion' started by bunyip, Jun 14, 2009.

  1. bunyip

    bunyip New Member

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    Hello all,
    I'm about to buy a second hand rifle and my favorite caliber is .280 rem but these just don't come up second hand. So I'm now focusing on a 7mm rem mag but not having fired one before I'm a little concerned about the recoil and noise of a magnum.
    I have noticed that these both take the same projectiles and really the only difference I can see is case capacity and powder load.
    What I really want to know is if I load down the 7mm to a 280 load will the 7mm behave exactly like a 280 if all else is equal(rifle, projectile weight etc).
     
  2. c3shooter

    c3shooter Administrator Staff Member

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    I'll offer a qualified "maybe"

    You can vary the performance of a cartridge a LOT based on how it is loaded- a very light .357 magnum, loaded with wadcutters, performs about like a .38 Special target load- and have even loaded 100 grain "plinker" loads for .308 Winchester-

    HOWEVER- a bullet/ velocity combo that does not match the rate-of-twist of your rifle will not properly stabilize the bullet, and accuracy will suck. For instance, .308 and 30-06 both use the same diameter bullet, but 30-06 is set up for a heavier bullet, and does not do as well as .308 with light stuff- nor does .308 do well with 200 gr bullets.

    IF rate-of-twist is same, difference should be negligible.
     

  3. robocop10mm

    robocop10mm Lifetime Supporting Member Lifetime Supporter

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    You cannot "change the caliber" but you can load to much different specs.

    A 7mm RM can be "down loaded" to behave much like the .280. This must be done by someone with much experience because the large case capacity can make smokeless powder behave erratically when less than 80% of the case is filled. Pressures that should go down may go up, a lot!

    Generally the starting loads for the Mag are about the same as the max loads for the 280
     
  4. cpttango30

    cpttango30 New Member

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  5. M14sRock

    M14sRock New Member

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    I'm a huge fan of .280 Rem as well. Great round.
     
  6. BILLYBOB44

    BILLYBOB44 Active Member

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    Second Hand Rifle.

    Maby I missed something Tango=I read "Second hand rifle" not "Handirifle"? This could be a bolt gun??:confused:
     
  7. c3shooter

    c3shooter Administrator Staff Member

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    Go over to auctionarms.com, advanced search, rifles, 280. There is a nice looking Remington with a "buy it now" price of $351, plus shipping. No, not mine. But they DO come up "2nd hand".
     
  8. cpttango30

    cpttango30 New Member

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    OOPS

    You would be better suited with buying a 7mm-08 or 7mm Mauser or 270 win. The 270 is based on the 30-06 and the 30-06 is based on the 7mm mauser. So they are all in the same family.