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.

Black Watch DPT


User Tag List

+ Reply to Thread
Page 1 of 2 12 LastLast
Results 1 to 15 of 18
Like Tree14Likes

Thread: 10 Shot Load Development

  1. #1
    Member Beavis's Avatar
    Join Date
    Dec 2011
    Location
    The Cape
    Posts
    4,411

    10 Shot Load Development

    I had a go at using this method today with my 6.5 Creedmeme.

    Components: 147gr ELD-M, once fired Lapua brass, 2209 and lit with CCI450's.

    Sized with a Redding FL bushing die, using a Wilson .288 bushing, with my brass this gives neck tension measuring .289-290. Seated to 2.8" OAL with a Redding competition seater.

    Oh and rifle, Bergara HMR

    I loaded 10 shots and chronied them -

    39.0gr - 2411fps
    39.2gr - 2446fps
    39.4gr - 2455fps
    39.6gr - 2473fps
    39.8gr - 2482fps
    40.0gr - 2496fps
    40.2gr - 2506fps
    40.6gr -2520fps
    40.8gr -2520fps
    41.0gr -2530fps

    I thought it was interesting that there was a near linear increase in muzzle velocity for 39.2gr up. 40.8 appeared to be in the middle of a plateau, which is what I was looking for.

    I didn't shoot at paper while doing this, just shot rounds over the chrony into the berm. I only wanted to see a plateau in velocity.

    Back at the bench I fired up my Lyman powder dispenser and set it to 40.8gr, and loaded up another 15 rounds. It usually gives me a variation of .1-.2 gr either side of the target weight if I just let it do it's thing and don't re-weigh. Some of the charges were spot on 40.8 gr, but others were 40.7, 40.9, 41.0.

    With the last few minutes of daylight I was unable to chrony the loads, but I got pretty reasonable results on paper at 100m.

    Name:  20180623_172129.jpg
Views: 591
Size:  3.59 MB

    Bottom group is the last shot, with more care, and POI adjusted .1 mil down and the same left. All loads were selected at random. Now to see how they do over the chrony. It seems like a good way to save components and time with a new gun. I could probably tighten those groups by playing with seating, or working up further and looking for another plateau, but if it looks good SD wise I might just run it.

    Anyone else do it this way?

  2. #2
    Member Beavis's Avatar
    Join Date
    Dec 2011
    Location
    The Cape
    Posts
    4,411
    Pic is on the piss

  3. #3
    Member Tommy's Avatar
    Join Date
    Nov 2014
    Location
    W-BOP
    Posts
    6,125
    Oddly, pic is correct on my phone, and 90 to left on PC.
    Identify your target beyond all doubt

  4. #4
    Member
    Join Date
    Apr 2014
    Location
    Invercargill
    Posts
    1,748
    Hey Beavis, great report. I have done it when i swap from Hornady to Lapua brass and work the treat. this process is better understand if shot a further distance to also check the POI variation, but, the way you done will work also. You got it right at the velocity variation, when you find the so called "flat spot" you get it in the very "middle" and work from there, at least it was what work for me, once you sort it out then the seating depth is a tune in point.
    I am not an specialist by any means but keen to help if i can.

    Good luck!

    Mac

    Result achieved from this method…

    Name:  fullsizeoutput_6b61.jpeg
Views: 587
Size:  177.5 KB

    Sorry but the photos looks like have been drinking all together…
    Attached Images Attached Images  
    Feather or Shoot likes this.

  5. #5
    Member Sideshow's Avatar
    Join Date
    Apr 2015
    Location
    UK
    Posts
    6,518
    Got to be happy with that....now if you stop shaking it would tighten up even more....
    Beavis likes this.
    It's all fun and games till Darthvader comes along
    I respect your beliefs but don't impose them on me.

  6. #6
    Fulla
    Join Date
    May 2012
    Location
    Cni
    Posts
    1,619
    Simlar, but I shot everything over a chrony and three or four shot groups at the same time.
    I'd load around 40.8 depending on pressure signs.

  7. #7
    Member
    Join Date
    Apr 2014
    Location
    Invercargill
    Posts
    1,748
    Suggestion!!! As you shooting 147gr projectiles have you thought about a slower powder? As stated in the very beginning, it s a suggestion and it is based on few friends shooting the lighter 140gr at faster velocities than the 2209 or 4350... being your projectile heavier it may be an option to look at.

    Keep the good work and get out and shoot!

  8. #8
    Member Beavis's Avatar
    Join Date
    Dec 2011
    Location
    The Cape
    Posts
    4,411
    Quote Originally Posted by PERRISCICABA View Post
    Suggestion!!! As you shooting 147gr projectiles have you thought about a slower powder? As stated in the very beginning, it s a suggestion and it is based on few friends shooting the lighter 140gr at faster velocities than the 2209 or 4350... being your projectile heavier it may be an option to look at.

    Keep the good work and get out and shoot!
    I have just been looking at Reloader 16. Sounds like it has become a go to powder for this cartridge. I might buy a bottle when my 2209 is burnt up.

    Interestingly, my above load is clocking marginally faster than my previous load - 41.5gr under a 140gr A max. The 147 has a pretty wicked BC, so I am not too worried about it being speed demon.
    PERRISCICABA likes this.

  9. #9
    Member
    Join Date
    Apr 2014
    Location
    Invercargill
    Posts
    1,748
    Quote Originally Posted by Beavis View Post
    I have just been looking at Reloader 16. Sounds like it has become a go to powder for this cartridge. I might buy a bottle when my 2209 is burnt up.

    Interestingly, my above load is clocking marginally faster than my previous load - 41.5gr under a 140gr A max. The 147 has a pretty wicked BC, so I am not too worried about it being speed demon.
    The thing with RL16 is “I” think it is a unicorn at the moment, have t hear of it yet in my “neck of woods”, will be interesting and challenge to keep the supply “I” think.

  10. #10
    Member Mathias's Avatar
    Join Date
    Oct 2015
    Location
    Canterbury, home of the big Rakaia Red Stag
    Posts
    3,332
    Quote Originally Posted by PERRISCICABA View Post
    The thing with RL16 is “I” think it is a unicorn at the moment, have t hear of it yet in my “neck of woods”, will be interesting and challenge to keep the supply “I” think.
    Talk to Kiwi Greg, he could have some.

    Sent from my SM-A530F using Tapatalk
    PERRISCICABA likes this.

  11. #11
    Member
    Join Date
    Apr 2017
    Location
    Christchurch
    Posts
    55
    Good stuff, similar to how my brother and I do our load development now. No point loadin 3 up at low charge weights when you won’t accept their low velocity anyway....
    Feather or Shoot likes this.

  12. #12
    Member
    Join Date
    Apr 2012
    Location
    Bay of Plenty
    Posts
    390
    Similar to how I do it. I do five for pressure signs at about 1% increments. Then load 4-5 lots of 3 at smaller% increments and chrony then onto paper with coloured tips and a long rest between shots @300m. I start from lowest to highest load, then highest to lowest, lowest to highest.
    I then plot vertical dispersal and compare it to standard deviation of velocities of that charge weight.
    I look for the load with the least vertical dispersion with the most consistent velocity.

    I'm way too OCD though, and it's a massive chore.
    Quote Originally Posted by PERRISCICABA View Post
    Hey Beavis, great report. I have done it when i swap from Hornady to Lapua brass and work the treat. this process is better understand if shot a further distance to also check the POI variation, but, the way you done will work also. You got it right at the velocity variation, when you find the so called "flat spot" you get it in the very "middle" and work from there, at least it was what work for me, once you sort it out then the seating depth is a tune in point.
    I am not an specialist by any means but keen to help if i can.

    Good luck!

    Mac

    Result achieved from this method…

    Attachment 89905

    Sorry but the photos looks like have been drinking all together…
    Sent from my WAS-LX2 using Tapatalk
    PERRISCICABA likes this.

  13. #13
    Not just an internet expert... The Claw's Avatar
    Join Date
    Dec 2011
    Location
    Gore
    Posts
    1,991
    Could also be worth trying Norma URP. I'm running it in my 6.5CM with the 147gr ELD-M's, very accurate and low ES & SD

    Sent from my SM-N950F using Tapatalk
    If it's not a first round hit you need to practice more

  14. #14
    Walking my rifle
    Join Date
    Dec 2015
    Location
    Hamilton
    Posts
    449
    this is exactly the way i have been doing it, i usually graph them at the bench by hand and then i usually find 2 plateaus, a lower one and one right up near where it starts showing pressure, i usually just choose the flattest one of the 2 and then load in the middle, it has been working well for me.

    I have a second press that fits into the towbar of my ute and i take my Lyman gen 5 to the range as well running it off the inverter, this way i can do it all is 1 range trip.

    I usually have a load in 10 rounds or less, then i load a few to test it at 100 and maybe 3 - 500 so i would say max 20 rds and i have a solid load.
    Walking my rifle

  15. #15
    Member Beavis's Avatar
    Join Date
    Dec 2011
    Location
    The Cape
    Posts
    4,411
    I wish I had tried this years ago to be honest. The old load up 5 shots in .3-.5gr increments and shoot 5 shot groups up to max is a really punishing time consuming and component burning method.
    Twosixty likes this.

 

 

Similar Threads

  1. .308 subsonic load development.
    By Manu in forum Reloading and Ballistics
    Replies: 40
    Last Post: 16-09-2017, 02:29 PM
  2. 6.5 STW case and load development.
    By 257weatherby in forum Projects and Home Builds
    Replies: 19
    Last Post: 10-08-2016, 09:12 PM
  3. Load development
    By Cartman in forum Reloading and Ballistics
    Replies: 8
    Last Post: 30-07-2015, 10:42 PM
  4. ADI 308 Projectiles / Load development
    By Tertle in forum Reloading and Ballistics
    Replies: 28
    Last Post: 12-06-2014, 08:15 PM
  5. Load development issue
    By ning in forum Reloading and Ballistics
    Replies: 12
    Last Post: 10-12-2013, 09:43 AM

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!!