Drops matched advertised bc's

Discussion in 'Rifles, Bullets, Barrels & Ballistics' started by RockyMtnMT, Oct 4, 2009.

  1. RockyMtnMT

    RockyMtnMT Official LRH Sponsor

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    Hey guys,

    Last weekend I got to shoot the 177g GS HV at 960yrds. My drop chart using the advertised bc worked right on.

    This throws a bit of a wrench into the gears of conventional thinking on 30cal long range bullets. According to my calculations they will out run the 240 SMK as far as you want to run the #'s.

    Run your own #'s and check it out. Remember the GS bullet will give you, give or take, 100fps over a conventional bullet of the same weight.

    Next weekend I'll go and shoot some antelope. Hopefully I can get one or two set up at long range, and weather that I am comfortable shooting long in. I'll post how it went down.

    Steve
     
  2. älg

    älg Well-Known Member

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    And what is the BC??
    Thanks
     

  3. Tony 0321

    Tony 0321 Active Member

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    On the GS web site it gives 3 different BC's for the 177hv in 30 cal which one did you go with I tried the .589 and that seemed a little high with my balistics chart. Also those bullets like to be seated close to the lands and my rifle wouldnt allow me to do that so I couldnt get the acuracy out of them so that may have been the problem but my new rifle should be back soon and I want to try them out in that..
    What kind of acuracy were you getting out of them at that distance. and what rifle are you sending them out of I am using the 300RUM...
    Good luck on your hunt and do report back on the performance of the bullet
    Thanks..

    Tony
     
  4. yobuck

    yobuck Well-Known Member

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    its necessary to actually shoot the bullets you want to compare at the same distances. a 220, and a 240 isnt even close to a 200smk at 1500 yds, in my 30x378. at 1700 the heavier bullets have a slight advantage. im strictly talking trajectory, not energy. thats about as far as i can see hits on a good day.
     
  5. RockyMtnMT

    RockyMtnMT Official LRH Sponsor

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    I used the .638 bc. I am running them out of a 30-338 Lap imp. MV of 3660fps. Shooting in a breeze of 5 to 8 mph at 1:00 I was able to hold 8" for 3 shots. I was holding right edge of a 20" gong. I was shooting at an elevation of 5200ft. I still have not been able to shoot them on a calm day.

    Steve
     
    Last edited: Oct 5, 2009
  6. MontanaRifleman

    MontanaRifleman Well-Known Member

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    That's good news Steve. What range was that 8" group?
     
  7. Tony 0321

    Tony 0321 Active Member

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    When I tried to shoot these bullets I had to change my bc on my drop chart down to .45 to get the right adjustment, I was shooting 3450fps out of my 300RUM but I did not play with them too much because unless I loaded them one at a time I couldnt get the oal long enough to reach the lands. I could get 1MOA and that was the best and they wouldnt do any better than a 10 in group at 700yds. I was really bummed because I had high hopes for these bullets but they didnt perform well out of my rifle. I dont want to give up on these just yet. My new finished rifle should be done hopefully by the end of the month and you have given me new hope for these bullets, thankyou I was impressed at the speed I could get out of them though and at 700 yds they were still blowing through 1/2 in steel plate the 168 barns only were making a dent in the metal at that distance. I just wish they were easier to get.

    Every day seems like a week waiting for that damn rifle to get done..
     
  8. MontanaRifleman

    MontanaRifleman Well-Known Member

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    Were you shooting the 177's or the 173's?
     
  9. Tony 0321

    Tony 0321 Active Member

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    I was shooting the 177 hv's I have only shot just a few of them mabye25 or so I was mainly interested in the velocity I could get out of them and I figured I follow the tips that they post to work a load for them after I got the velocity they suggest for my rifle I shot for a few groups and they shot Ok but not steller but they also said that they like to be seated just a few thousandts of the lands and I couldnt get that without loading one at a time so I didnt expect too much.. I still had a few loaded so I thought what the hell I'd fling a few at a little farther distance just to see what happens I wasnt getting the best acuracy out of them and they seemed to be shooting low at 700 yds so I adjusted the scope to center the group around the bullseye and then took that adjustment and changed the bc on my computer program till it matched actual readings of the scope and the bc that gave me the same computer generated info as actual was in the .45 range.. But like I said I wasnt getting very good accuracy out of them and I didnt want to burn them all up before I got my new rifle finished so I didnt work very hard on the load for it so I am not blaming the bullets its more than likly my error
     
  10. RockyMtnMT

    RockyMtnMT Official LRH Sponsor

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    MR,

    The range was at 960yrds. I still did not have a calm day, but it was much better than the session before. I felt good about the bullet drop.

    We were also trying some load development with a 7 ultra. I don't think they like the jump caused by the free bore. We did not try to load them to the lands, I don't think they will reach as a single shot. We'll just save them for a different 7.

    Steve
     
  11. MontanaRifleman

    MontanaRifleman Well-Known Member

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    Sounds like descent accuracy, especially considering the conditions.

    Hope I can get some of these bullets soon. The Alaska dealer is no longer handling them because of the ATF BS and paperwork. Need to get them directly from GS. Spendy suckers too.

    I would load to the lands and put one down. The top bullet tip would be above the mag wall and I rarely need a second shot.

    Thanks for the report. These bullets sound awesome.

    -MR
     
  12. Tony 0321

    Tony 0321 Active Member

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    I cant complain about them as I have not fully given them a fair chance I didnt like the price but if they work like they are advertised and I can get the acuracy out of them then they will be worth the money.. I just hope I dont have to wait 5 months to get the next order..So you seated them right up to the lands? Did you play with the seating depth at all? How hard was it to get the accuracy out of them that you got? Also I really want to hear how your hunt goes and how well they perform. Up here just about everything I shoot is bigger than an antelope but I am still intersted.. Oh yea and when you do get one it would be good to hear about the meat damage it causes expecially sending that bullet as fast as you are

    Thanks
    Tony,
     
  13. MontanaRifleman

    MontanaRifleman Well-Known Member

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    Tony, You'll have to ask Steve all those questions. I have not shot them yet. I'm hoping to order some before too long, but things are real tight for me right now and I have a few other priorities. Got involved in another rifle project. I wont be using them this hunting season but I hope I can get a load worked up by spring bear season. Steve is shooting a 30-378. I'll be shooting a 300 RUM and *hope* to get about 3550 give or take out them. If I can get that velocity, they would have potential to be a 1500 yd deer/elk load based on their opening velocity of 1600 fps. All very optimistic, but I think they will be capable of well past 1K.

    If I can load 210 Bergers to the lands, I'm sure I can load these to the lands. They are very similar in length and shape. They wont fit the mag, but I can still put one down as explained above. Good enough for me till if and when I get an extended mag.

    Steve has used the 173's on game and he said they are great killers.

    Regards,

    -MR
     
    Last edited: Oct 7, 2009
  14. Tony 0321

    Tony 0321 Active Member

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    Sorry about that I got you guys mixed up.. I was putting them through my 300RUM with IMR7828 I think it was 95 grns but I would have to look back at my notes to be sure I was getting slight pressure sighs at that charge but I was sending them out of my 26 inch barrel at 3450.. I am going with a 27 inch barrel this time and going to go with retumbo or h1000 as they are not as much affected by temperature and I hope with the longer barrel I should be able to get around 3500 with the new rifle.. My longest kill ws at 826 but I hope to break the 1000yd barrier this season and I am hoping these are the bullets that will get me there....gun)