Quantcast
  1. Sign up now and join over 35,000 northwest gun owners. It's quick, easy, and 100% free!

.30 Cal. question

Discussion in 'Ammunition & Reloading' started by svg4, Jul 16, 2011.

  1. svg4

    svg4 Oregon Bronze Supporter Bronze Supporter

    Messages:
    288
    Likes Received:
    11
    This may seem like dumb question but until recently I haven't loaded much but 270,308 and 223. My question is this. I just bought a 30-06. I was given about 800 Hornady .30 cal.150 GR SP Interlock. It also says .308. I thought .30 cal was .30 cal. Can I load these into my 30-06?
     
  2. Mark W.

    Mark W. Silverton, OR Bronze Supporter Bronze Supporter

    Messages:
    5,782
    Likes Received:
    4,990
    yes
     
  3. Nwcid

    Nwcid Yakima and N of Spokane Well-Known Member

    Messages:
    3,593
    Likes Received:
    1,480
    uummm the .30 in .30-06 IS .30 cal. .308" is US .30 caliber.
     
  4. svg4

    svg4 Oregon Bronze Supporter Bronze Supporter

    Messages:
    288
    Likes Received:
    11
    uummmm,Thanks, still learning
     
  5. Throckmorton

    Throckmorton Florence,Ore ah gone Well-Known Member

    Messages:
    1,375
    Likes Received:
    169
    some of this ammo nomenclature is very confusing. 30-30's also use .308 jacketed bullets. The ammo we know as .223 Remington..the bullet measures .224

    etc,etc
     
  6. deadshot2

    deadshot2 NW Quadrant WA State Well-Known Member

    Messages:
    2,407
    Likes Received:
    537
    What's really interesting is how .38 cal is really .357". Why didn't they just call it a "35"?
     
  7. One-Eyed Ross

    One-Eyed Ross Winlock, WA Well-Known Member

    Messages:
    1,367
    Likes Received:
    752
    Because .38 was the the diameter of the loaded case. It was a naming thing to make it seem bigger than the .36 caliber navy it really is....
     
  8. deadshot2

    deadshot2 NW Quadrant WA State Well-Known Member

    Messages:
    2,407
    Likes Received:
    537
    So there was a "size game" back then too:)

    Using that logic those who are "carrying .45's because there is no .46 could really say they are carrying .47's as the finished case diameter is .476";)
     
  9. AMProducts

    AMProducts Maple Valley, WA Jerk, Ammo Manufacturer Silver Supporter

    Messages:
    2,805
    Likes Received:
    1,861
    I know it's kinda odd the way cartridges and whatnot are named, but here's kinda've a basic primer on it:

    cartridges, generally (from 1890-1950) were all classified by their bore diameter. So if it has a .30" on it, it's a .300 bore diameter. However, bullets are sized so they will both fit in the bore, but are larger so they will engage the grooves of the rifling. Typically, this is about a .004" addition to the radius, but this dimension is also dependent on bore diameter.

    This is true for .30-30, .30-06, .30-40 krag etc.

    An interesting side note, the .303 british, and many other rifles that were made outside the US use a .303 diameter bore, and use a .311" diameter bullet, thus, they maintain that .004" groove dimension.

    In later nomenclature, bullet diameter became a more standard identifier for the cartridge, thus .308 winchester, and .223 remington. However, the military names of 7.62x51 and 5.56x45 were based on bore diameter. To make it more confusing, some manufacturers have chosen to use still other naming schemas, an interesting example is lazzeroni, which makes cartridges such as the 7.82 warbird, which uses a .308" bullet.

    If you arn't confused enough already, generally speaking most reloader bullets you find will say both the caliber and the bullet diameter, I think hornady does this, as well as sierra and barnes. They will typically say ".30 caliber" and then give the bullet diameter of .308". There are also ".303 caliber" which will then give a bullet dimension of .311 or .310. These bullets are not safe to load in .30 caliber at full pressure and should be avoided as injury and damage to the firearm may result.
     
  10. darkminstrel

    darkminstrel PDX Well-Known Member

    Messages:
    1,383
    Likes Received:
    156
    Such as the non-Finn versions of the Mosin-Nagant. Which makes reloading for them a bit of a pain.