rifle mag primers -v- large rifle primers

Discussion in 'Ammunition & Reloading' started by ricardo, Mar 15, 2010.

  1. ricardo

    ricardo New Member

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    I got a ? about using large rifle primers versus large rifle mag primers, I have developed several differant loads for my 300 win mag using cci 250 primers and since the mag primers are getting a little hard to find, can a regular large rifle primer be substatuted for a mag primer with out a big change in performance with out causing pressure problems, i have found a little info using a large rifle primer, but it seems the loads are a little slower, and can a cci primer and winchester primer be safely swaped for one another, it seems that federal and cci can safely be substituted.thanks.
     
  2. Txhillbilly

    Txhillbilly Active Member

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    I never use the magnum rifle primers.I have never seen any improvement in accuracy with them in a 300WM load.If you were loading compressed powder loads,they might work better but for standard charges the regular large rifle primers will work just fine.
     

  3. deth502

    deth502 New Member

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    the cups are often harder/thicker on mag primers.

    substituting std primers may result in the primer piercing and sending 60,000+ psi of molten gasses back into your face.

    then again, they may work fine.

    it all boils down to weather or not you want to take the chance.
     
  4. cpttango30

    cpttango30 New Member

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    The main reason for the use of magnum primers is that you need a larger hotter flame to get a good solid burn going on that big fat column of powder. They are also thicker to stand the higher pressures that many magnum cartridges produce.
     
  5. jpattersonnh

    jpattersonnh Active Member

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    Here is a VG article. Scroll down. I use standard Lg Rifle in 120..140gr 7MM rem mag loads and Lg rifle Magnum in 160+ gr loads.
    exterior ballistics
    It is perhaps worth mentioning that some of this class of primers have been developed for very specific applications. The Federal 215 primer, for example, was designed to reliably ignite the massive powder charges associated with the Weatherby line of magnum cartridges. These should be used as shown in the loading tables, and must not be randomly substituted for standard large rifle primers. With their sharper ignition characteristics, they will frequently give higher pressures than a standard primer used in an otherwise identical load.

    Not true at all!!
    the cups are often harder/thicker on mag primers.
    substituting std primers may result in the primer piercing and sending 60,000+ psi of molten gasses back into your face.
    then again, they may work fine.
    it all boils down to weather or not you want to take the chance.
     
    Last edited: Mar 16, 2010
  6. ricardo

    ricardo New Member

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    I have been using 75gr H-4831sc with 165 gr sierra btsp with outstanding results,and 80 to 81 gr H-1000 with same bullets and cci 250 on both loads does anybody use close to this with just large rifle primers.?
     
  7. c3shooter

    c3shooter Administrator Staff Member

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    Rules for a long and happy life if reloading:

    1. Read the load in the book
    2. USE the load in the book
    3. It is called a STARTING load since that is where you start.
    4. Change ANY component- primer, powder, brass or bullet- go BACK to the starting load, and work up.
    5. Most accurate load is rarely the hottest load.

    While you will not be blazing trails in the annals of reloading, you are rarely at the ER having bits of your firearm located and removed from your body. :rolleyes:
     
  8. ricardo

    ricardo New Member

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    yes, good advice, and i have always stuck to the load charts mainly for health reasons but second reason not enough cash flow to be tearing up good firearms, i have printed off some reloading tables from the hodgen site and they are pretty close in comparison to the speer reloading manual,just have always used the speer guide and nothing else,i just never found a need to use anything else till now, some of the loads are tack drivers ,anybody know when the mag primers will be easier to find.
     
  9. c3shooter

    c3shooter Administrator Staff Member

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    Folks that had not bought a primer in 10 years ran out and bought a 5 gallon bucket of them. So when Joe, who usually buys 300 a month, saw the stocks dwindling, HE bought a 5 gallon bucket. Pretty soon the shelves were emptier than the Dunkin' Donuts located between Weight Watcher's and the Police Academy. The makers are producing, and product IS getting shipped, and they ARE out there- just takes a while. Same thing with ammo. Same thing with AR style rifles.
     
  10. ricardo

    ricardo New Member

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    lol, i have three gun shops in my area and they have been out for months, i know it wont be long, it was the same way with the small rifle for a while and now they are pretty handy.
     
  11. hunter Joe

    hunter Joe New Member

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    Winchester makes a duel purpose primer that is labeled on the box " for use with large rifle and magnum rifle". This is like two primers in one. I haven't tried them yet because I haven't had to, but we sell them at the shop. Makes me wonder about the whole primer issue.
     
    Last edited: Mar 17, 2010
  12. J T Patriot

    J T Patriot New Member

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    To understand the difference between magnum and std primers and how they work, you first need to understand how different propellents work. Powders like bullseye and red dot are true exolosives and are designed to spontainiously combust where as stick powders like H4831 and IMR 4350 produce gas almost one stick at a time in a chain reaction. To help ignite the large charges in slower burning powders magnum primers are designed to dispurse multiple ignition sources through the flash hole to excelerate the ignition of the large charges of the slower burning in an effort to change the powder into gas prior to the projectile leaving the barrel.
    There, it didnt take long to tell everything I know about the deal,but I hope this helps.
     
  13. ricardo

    ricardo New Member

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    I did a little comparing last night with the speer book and the chart on the hodgen site, not much differance on loads, and one is using mag primers and the other just large rifle,with SOME of the same powders, i have no doubt that the mags may be hotter, they were designed for a purpose or need that was there but wasnt it just for the big magnums to start, such as the weatherby's that use nearly 10 grains more of powder?
     
  14. paul

    paul New Member

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    receipe for .30 cal carbine?

    Hi, looking for a suggestions on load for 110SP, REM. brass, Thanks
     
  15. paul

    paul New Member

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    .30cal

    Also, what primer size/type please? Thank you