Welcome guest, is this your first visit? Create Account now to join.
  • Login:

Welcome to the NZ Hunting and Shooting Forums.

If this is your first visit, be sure to check out the FAQ by clicking the link above. You may have to register before you can post: click the register link above to proceed.

DPT Knives Africa


User Tag List

+ Reply to Thread
Results 1 to 15 of 15
Like Tree4Likes
  • 3 Post By Tahr
  • 1 Post By diana2

Thread: 7mm08 16.5 inch barrel speed?

  1. #1
    Member
    Join Date
    Jan 2018
    Location
    Helensville, Auckland
    Posts
    71

    7mm08 16.5 inch barrel speed?

    Does anyone know a approximate barrel velocity for 7mm08 out of a 16.5 inch barrel
    factory 140 grain bullets (Remington corelokt)
    the factory has it at 2800 out of a 22 inch
    trying to calculate a drop/energy chart for hunting
    eg how far out bullet will expand properly for a ethical shot
    i do not have access to a crony

  2. #2
    Member carlhurley's Avatar
    Join Date
    Jul 2012
    Location
    te kuiti
    Posts
    169
    at a guess 2500 with 308 factory ammo 147 gn velocity out of 24 inch barrel is 2780 out of my 12 inch 308 it is 2200 out of my 16 inch 308 is 2450

  3. #3
    Member 300_BLK's Avatar
    Join Date
    Aug 2014
    Location
    Central North Island
    Posts
    2,076
    https://rifleshooter.com/2014/12/308...ty-28-to-16-5/

    25 FPS per inch

    Use this as a reference, but it all depends on your Ammo choice and individual barrel. Chrono is recommended for accuracy, however you can use the @Gibo method of shooting at distance and calculating the drop to determine FPS from the muzzle.

    Either way I would recommend you shoot some steel/rocks/targets at the farthest distance you intend to take a shot on an animal to make sure you can hit what your shooting.

    Do you own a range finder?
    Warm Barrels!

  4. #4
    GWH
    GWH is offline
    Member
    Join Date
    Jul 2012
    Location
    Napier, Hawkes Bay
    Posts
    2,761
    I run a 15" barreled 7mm-08 for bush hunting. I use 140gr NBT handloads with a stiff load of CFE223 and get 2700 fps. Id say the factory loads would be 2400 to 2500 at a push.

    Best thing to do is just get out and shoot it out to 300 yards or what ever distance you want to use it to and record the actual drop, then setup from there.

  5. #5
    Member Marty Henry's Avatar
    Join Date
    Oct 2014
    Location
    Tararua
    Posts
    2,980
    No substitute for real world testing in my opinion. At the end of the day knowing the speed is irrelevent, knowing where it goes at different ranges and being familiar with the firearm is.

  6. #6
    Member Tahr's Avatar
    Join Date
    Dec 2011
    Location
    NI
    Posts
    5,448
    CFE223 is a great powder for the short 7-08. You can substitute it with BLC-2, but its quite a dirty burning powder.

    For mine with 18" barrel 140 grn Berger @ 2800 and 120NBT @ 3000fps. I'm using the 120's successfully. I used the 120 Sierra for many years right from when the 7-08 first appeared in NZ.

    With the NBT one heavy mature red stag last year after the roar at 400 yards - shoulder shot - bullet was in the opposite shoulder. He ran 20 yards down hill dead on his feet. Have shot quite a few deer in the 300-400 range with them and never had a problem. The 120NBT is stout and works at bush ranges too.

    Ummm, what was the OP's original question again? I got a bit carried away there.
    7mmsaum, madjon_ and GWH like this.

  7. #7
    Member
    Join Date
    Mar 2012
    Location
    Waikato
    Posts
    773
    A mate says he's chronied his 18" 7mm08 with factory winch ballistic Silvertips at 2550.
    Most reliable way is to shoot at 100m and 300 m on the same day with same ammo and choose a velocity that fits your trajectory. It will save you heaps of ammo and petrol in the end. A rangefinder will also help a lot if you try and shoot past about 200m.

  8. #8
    Member
    Join Date
    Mar 2012
    Location
    Waikato
    Posts
    773
    I say 100 & 300 because your 100m group will be small enough to get a good idea where it is and you've got enough leverage to estimate trajectory difference . Not so much drop between 200 and 300 and you won't be able to pinpoint the groupp centre so well at 200. Ranges dont have to be exactly 100 and 300 as long as you know exactly by rangefinder what they were. Eg 67m and 284m would be fine. Shots on paper will also tell you how far you can realistically hit something under favourable conditions. Take a minute to look where the shots fall in your reticle at max mag too and write it down.. who's getting carried away now ?

  9. #9
    Member
    Join Date
    Dec 2013
    Location
    Tokoroa
    Posts
    794
    trying to calculate a drop/energy chart for hunting
    eg how far out bullet will expand properly for a ethical shot
    i do not have access to a crony[/QUOTE]

    Most standard bullets need a velocity of 1800fps on impact to expand reliably, You could use SST's they are designed to expand at long ranges
    should be Ok at reduced velocity.

  10. #10
    Member
    Join Date
    Jan 2018
    Location
    Helensville, Auckland
    Posts
    71
    thanks guys
    ive never shot anything more then 150m
    just want to figure out what i can do should the opportunity arise

  11. #11
    Sending it Gibo's Avatar
    Join Date
    Feb 2013
    Location
    The Hill
    Posts
    19,920
    What part of the country are you in Muka?

  12. #12
    Member diana2's Avatar
    Join Date
    May 2015
    Location
    top of the south
    Posts
    305
    139 horn sst BC.486, win748 powder 44.4gr , std primers,fed.brass, 2700fps +2'@100yds 0@ 200yds in Tikka 595 16.5' barrel
    or
    39.5gr BM2 2650fps
    winaa likes this.
    Or you can stay within 300 yards and keep life a lot simpler.

  13. #13
    Member
    Join Date
    Jan 2018
    Location
    Helensville, Auckland
    Posts
    71
    Quote Originally Posted by Gibo View Post
    What part of the country are you in Muka?
    Helensville, Auckland

  14. #14
    Member
    Join Date
    Apr 2016
    Location
    Rotorua
    Posts
    172
    If you would like to do a day trip to Rotorua we have 2 shoots a month out to 300m at the local Deer stalkers range that would help you a lot.
    You could write down your drop at 200 and 300 and I also have a chrony that you could use to workout a card to 400, which will be about the limit for a 16.5in barrel
    Our shoots are pretty informal with all sorts of rifles turning up so don't be put off thinking we are flash target shooters, one day we had a guy shooting 300m with a open sight SKS resting on top of a block of wood and a paint tin and hitting the target.
    Cost to non members is $10.00

  15. #15
    Member
    Join Date
    Jan 2018
    Location
    Helensville, Auckland
    Posts
    71
    Thanks Winaa , i will PM you next time im in the bop

 

 

Similar Threads

  1. FS: T/C Encore Barrel 15 - inch barrel, 7.62x39
    By Coelacanth in forum Buy, Sell or Swap
    Replies: 2
    Last Post: 24-09-2018, 09:53 PM
  2. FS: AR 15 300 aac barrel 10.5 inch and 16 inch
    By vbull in forum Buy, Sell or Swap
    Replies: 7
    Last Post: 03-09-2017, 10:52 PM
  3. Barrel length and speed - interesting articles [6.5 Creedmoor and .308]
    By hotbarrels in forum Reloading and Ballistics
    Replies: 2
    Last Post: 21-02-2017, 09:39 AM
  4. remington 7mm08 20 inch near new bargin
    By dale in forum Buy, Sell or Swap
    Replies: 6
    Last Post: 02-04-2015, 07:53 PM
  5. 15 inch 223 barrel
    By rambo-6mmrem in forum Firearms, Optics and Accessories
    Replies: 11
    Last Post: 21-07-2014, 05:02 PM

Tags for this Thread

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
Welcome to NZ Hunting and Shooting Forums! We see you're new here, or arn't logged in. Create an account, and Login for full access including our FREE BUY and SELL section Register NOW!!