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Thread: 07/08 bullet weight

  1. #1

    07/08 bullet weight

    Just one to fellow 07/08 users,Ive been a convert from 308 for a year or so and due to a bad barrel, now sorted, Ive taken a while to appreciate the cal.Im now enjoying it and have been reloading nosler140, inch and aquarter at 200yds. My latest reloads have been nosler 150s and to be honest they seem slightly better and I dont think there is much difference in recoil and with the ballistic advantages of this weight, why does 140 seem the go to weight Those with more experience please advise!

  2. #2
    Quote Originally Posted by jtl View Post
    My latest reloads have been nosler 150s and to be honest they seem slightly better and I dont think there is much difference in recoil and with the ballistic advantages of this weight, why does 140 seem the go to weight Those with more experience please advise!
    By 'slightly better' do you mean that they group better? If so, that is an advantage over the 140grainers.
    By 'ballistic advantage' of 150gr over 140gr, do you mean in abstract - i.e. that 150gr have a better BC or some such? Or do you mean that in the context of your load the 150grainers' combination of MV, BC and grouping gives them overall advantage over the 140gr bullets for your intended use?

  3. #3
    I had a similar experience with both 140 and 150 grain Sierra Gamekings. Both running 42 grains Varget the 150's had the edge in accuracy 0.75 MOA to 0.87 MOA the average of many groups. 2800 fps v 2761 fps, both were effective in the field but I like the idea of having more wallop and penetration due to the higher sectional density with the 150's. I never recovered a bullet of either weight they always exited.
    I dropped both these loads in favour of the 120 Prohunter with 47grains IMR4895 which was 0.5 MOA and 3200 fps.
    Current battery, Air Arms TX200 MK3 .177, Hawke Vantage SF 3-12x40, Anschutz 1427B .22LR Sporterised Biathlon rifle, A-TEC wave mod Nikon 4.5-14x40, Tikka M595 .222Rem Leupold 6.5-20x40 LR. Howa 1500 APC .308win Varmint Nikko FFP 6-24x50 Wildcat Evo. Sauer 202 Classic XT .243Win Leupold VX3 4.5-14x50 Wildcat Evo.

  4. #4
    I started using 140gr Federal loads with Nosler BTs and their Fusion bullets. I also tried the Power Shok rounds with 150gr Speer HotCor rounds. Honestly, all of these were excellent, with the Nosler rounds having a slight edge in terms of accuracy, but in practice I would still use any of the Federal range. Then I started reloading using 150gr bullets, partly because I too like to thing that a slightly heavier bullet may pack a bit more punch, mostly because the 7mm bullet that I wanted to use only came in 150gr. My reloads are more accurate in my rifle than any of the factory rounds (39.1gr of N140). But it's a trade-off, and these are hunting rounds, not target rounds. I probably won't ever need to shoot at 300m so having a slightly slower round is fine. I have no idea how fast my round really are, although Quickload provides a theoretical estimate. I do know that all the deer fall over and die. So you know, that's good enough...

  5. #5
    My experiences have been very similar to PM. I have settled now for the past few years with Sierra GK,150 at 2800. Left, and Speer 145 when i could not get hold of sierra. Not a lot of difference, all drt.

    I tend to go through the shoulder if the beast is close to a march and have retrieved a couple of bullets.

    Attachment 70692

  6. #6
    Added to which, and I know we don't all use these powders, it could go some small way to answer the ops original question....
    Attachment 70694

  7. #7
    Quote Originally Posted by jtl View Post
    Just one to fellow 07/08 users,Ive been a convert from 308 for a year or so and due to a bad barrel, now sorted, Ive taken a while to appreciate the cal.Im now enjoying it and have been reloading nosler140, inch and aquarter at 200yds. My latest reloads have been nosler 150s and to be honest they seem slightly better and I dont think there is much difference in recoil and with the ballistic advantages of this weight, why does 140 seem the go to weight Those with more experience please advise!
    My observation when I investigated buying a 7mm08 was that factory ammunition was commonly loaded in 140gr, so in some respects the answer to your question is - fashion.

    Regards

    JCS

  8. #8
    I load Sierra Game King 150's for those times i'm hunting in 'monster' mule deer country. I load Sierra 120 Game Pro for everything else. ~Muir

    And actually, the last mule deer I shot with that 120 was a huge mule deer wounded by another shooter.....

  9. #9
    finally got back to the thread,I did have a accuracy advantage with the 150gr over 140gr. The 150s are Ramshot hunter at 49.3gr and the 140s are h4350 at 47.8 for 2810fps 22"barrel, just thought that with the bc advantage the energy retention was worth it with 150s and its good to see others have found this.Do you find the 120s are not much effected by wind in comparison?

  10. #10
    Quote Originally Posted by jtl View Post
    finally got back to the thread,I did have a accuracy advantage with the 150gr over 140gr. The 150s are Ramshot hunter at 49.3gr and the 140s are h4350 at 47.8 for 2810fps 22"barrel, just thought that with the bc advantage the energy retention was worth it with 150s and its good to see others have found this.Do you find the 120s are not much effected by wind in comparison?
    How far are you shooting??~Muir

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