Can my 7mm STW Rifle Shoot Other 7mm Rounds?

I have a decent rifle for having fun at the range. It is a Remington Sendero (1st Edition) chambered for the 7mm STW. Now by no means am I new to guns. But I was wondering if I could shoot any other 7mm bullets through this rifle? Such as 7mm Rem Mag which are cheaper... but SHORTER in the casing. Or a Remington Ultra Mag (RUM)? I figured I should ask before I do something dumb and hurt my rifle or worse myself. Thanks!

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  • ?
    Lv 4
    9 years ago
    Favorite Answer

    No you can't. Headspace is not the only issue here. The Ultra is beltless and fatter so no fitting problems there because it wouldn't. The 7 Rem mag would probably chamber. Lots of headspace due to body case length (gun damage, personal body injury maybe even death will occur). Your 7 STW is a 8mm Rem mag case necked down to .284 caliber. The 8mm Mag case is a 375 H&H case necked down to .323 caliber and a sharper shoulder angle added. Playing with 60- 80+ grains of high rate burning rifle powder = hospital or morgue.

    Source(s): Don't do it. 8mm Mag case's aren't that expensive to buy and neck down to the STW if you aren't doing so already? (Start reloading) for this rd. I own and reload for the 8mm Mag. It's as cheap as most popular magnum chamberings to reload for. The factories take advantage of unpopular chamberings such as your's and mine and therefore raise the $$$ bar because some don't bother to reload and thus are stuck with factory stuff which by the way are feasable at the most in terms of accuracy and power. Would you rather pay $70-$80 for a box of 20 rd ammo, or invest about $20 to $150 more on a good reloading kit that pays time and time again on less than half that cost on the box of ammo? And you customize it yourself to shoot what you want.
  • It's a good thing you stopped to ask. This is a bad idea. See, the rifle is designed around a particular cartridge with specific case contours. These contours will affect the ability of the round to sit properly in the chamber when firing.

  • 3 years ago

    7mm Stw Ammo

  • 9 years ago

    Glad you asked. You saved yourself some trouble. Now spend some time reading about headspace. None of these is a straight-walled, rimmed cartridge, so there's no possibility of interchangeability.

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  • 9 years ago

    NO!!!!!!!!!!!!!! don't be a moron they are all diferent bullets I don't care if they are the same calliber

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