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Thread: Hornady GMX

  1. #1

    Hornady GMX

    I have been using H4895 powder with Hornady 165 gr Interlocks in my sako 85 in 308 giving me 2656 fps and a pretty tight group,my supply of hand loads was getting low and due to lack of like for like replacements decided to work on another load with something more available.
    Picked up a couple of boxes of Hornady 150gr GMX as the stocks seemed pretty high and a tub of Vihtavouri n550, loaded some test rounds (which I havn't tried yet ) and still I didn't notice.
    Sat down at the PC yesterday and looked at the box, Qty 50, hit me between the eyes, thought I'd bought 200 heads and at 39.95 a box it makes for a pricey replacement. Has anyone else paid around that price or have I been done ?.

  2. #2
    That's about the right money Kev I have tried them in 7mm08 and a friend in 223 and we have found we are getting runners with them about 50% to be more precise they just don't seem to expand as well as the interlocks and seem to just pencil through , I have made enquiries with Hornady and they have told me to go up 10gr and slow them down a bit for more satisfactory results .
    www.anglocustomrifle.co.uk
    Anglo deer management and training
    Yet another 7mm 08 user ..................... if Carlsberg made calibers.........................

  3. #3
    I bought some of these to load for my .30-06, couldn't get a decent group with a number of different loads and had a helluva job cleaning the left over copper out of the barrel, I'll be sticking to SST's.

  4. #4
    Quote Originally Posted by pierred View Post
    and slow them down a bit for more satisfactory results .
    surely speeding them up is required if they are pencilling? no

  5. #5
    GMX copper they are PISH 20 shots at deer 14 long distance runners thank Christ I have a dog.

  6. #6
    Quote Originally Posted by bewsher500 View Post
    surely speeding them up is required if they are pencilling? no
    No Eddie if they are going to fast they just pencil through slow them down and it gives expansion a chance ,unless you are using a ballistic tip then the opposite applies .
    www.anglocustomrifle.co.uk
    Anglo deer management and training
    Yet another 7mm 08 user ..................... if Carlsberg made calibers.........................

  7. #7
    My understanding is that they are made out of gilding metal, a harder alloy than pure copper used by Barnes. Combine this with a heavy ish bullet that penetrates like mad and it's not surprising that the results are a little less than perfect. Unfortunately hornady and Nosler are a few years behind Barnes and GS custom in realising that light for calibre bullets give the best performance with non lead bullets.

  8. #8
    Quote Originally Posted by srvet View Post
    My understanding is that they are made out of gilding metal, a harder alloy than pure copper used by Barnes. Combine this with a heavy ish bullet that penetrates like mad and it's not surprising that the results are a little less than perfect. Unfortunately hornady and Nosler are a few years behind Barnes and GS custom in realising that light for calibre bullets give the best performance with non lead bullets.

    This as I understand it is due to higher impact velocities to aid expansion on a harder solid
    slowing down hard bullets on light game leads to the pencilling you describe

    I have some gmx to try in 270
    but they are clocking close to 600fps more and are 30gr lighter

    expect them to work better than described

  9. #9
    The factory 270 ones are very good in terms of accuracy and ability to kill humanely

  10. #10
    I've tried gmx in .223 and couldn't get a group so gave up. if anyone has any load data let me know please. I get the impression because they are made of copper they are lighter so have to be longer to get the required weight. This means they are a pain to stabilise.

    I don't really get my were moving away from lead bullets. Who ever died of lead poisoning? and why change something that works well?

    in most cases the best materials have been used for centuries i.e. leather, wool and lead bullets!

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