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.

Delta ZeroPak


User Tag List

+ Reply to Thread
Page 3 of 3 FirstFirst 123
Results 31 to 45 of 45
Like Tree29Likes

Thread: What causes key holing in sub loads

  1. #31
    Member
    Join Date
    Dec 2013
    Location
    Tokoroa
    Posts
    1,221
    Quote Originally Posted by Bill999 View Post
    That sounds great mate
    Is HP hollow point?

    I'm getting the feeling that I'm not setting these ones up right.
    Are there hard and fast rules to getting lead projectiles right?
    I'm pushing them with 8.5 gr trailboss to get under the sound barrier
    Yes they are Hollow point and the lead mix is soft with the lube is good to 2000fps before lead fouling happens
    they should expand to around .400" at 1050fps, 8.5 of Trail Boss is ok for sub loads, if you want a bit more range
    AR2206H is good to push up to 1900fps
    Micky Duck likes this.

  2. #32
    Member
    Join Date
    May 2012
    Location
    Far North
    Posts
    4,811
    Right from the start I intended to make an overgrown subsonic .22 so fast lead hollow points really are my ultimate projectile

    At the moment I can stack ballistic tips at 25m but when I dig them out of the ground they look ready to load back up again

  3. #33
    Member
    Join Date
    Dec 2013
    Location
    Tokoroa
    Posts
    1,221
    The standard jacketed bullets need an impact velocity of 1800 fps to expand the only jacketed bullets that will expand are the special subsonic ones
    coming out now but they are very expensive, The cast bullet has been killing things since the 1850s no reason why they won't work now.

  4. #34
    Official Cheese Shaman Spanners's Avatar
    Join Date
    Dec 2011
    Location
    Chch
    Posts
    6,322

    What causes key holing in sub loads

    I have gear for expanding subsonic jacketed bullet manufacturing in 30 and 44 + a lot of other tooling and components.
    If anyone is interested in purchasing it I’d take $7k ono for the lot as simply don’t have time to use with other commitments. $20k+ to buy new with a 2yr wait.



    Sent from my iPhone using Tapatalk

  5. #35
    Member
    Join Date
    Jul 2013
    Location
    Waikato
    Posts
    2,395
    Have you got a photo of the new 200g pills Robert?i might be keen on some.

  6. #36
    Member
    Join Date
    May 2012
    Location
    Far North
    Posts
    4,811
    Yea mate they just arrived


    Name:  6D4E1040-3E3F-4A0D-8F15-6CE0F5329A14.jpeg
Views: 267
Size:  1.10 MB

  7. #37
    Member
    Join Date
    May 2012
    Location
    Far North
    Posts
    4,811
    I only have 4 primers left so I need to wait till next week for them to arrive

    They look like perfection for a subsonic projectile, the ballistic tips I'm using at the moment look like I can re use them when I dig them out


    Name:  IMG_3423.JPG
Views: 275
Size:  1.26 MB

  8. #38
    Member
    Join Date
    Aug 2012
    Location
    helensville nz
    Posts
    4,365
    I haven’t read this entire thread so maybe above
    If you are shooting cast bullets you need to make sure they are oversized for the bore
    309 or 310 in this case
    It could be twist rate related for sure also

    Gaschecks on bullets although they shouldn’t affect functionality at subsonic speeds they are not required for slower load a flat base lead bullet should be just fine unless you’re going to load the same bullet supersonic and can’t be bothered with 2 bullets

  9. #39
    Member Marty Henry's Avatar
    Join Date
    Oct 2014
    Location
    Tararua
    Posts
    6,632
    Just looked at your recovered bullet photos, thats quite solid rifling engraving with a bit of metal scraped into in the boat tail. With a cast bullet which is larger you could be getting tails of metal off the bullet that upset the aerodynamics. Just anothet thing to consider.

  10. #40
    Member
    Join Date
    Dec 2013
    Location
    Tokoroa
    Posts
    1,221
    At subsonic velocity the range the bullets are used at 150 metres or less I don't think aerodynamics will be a problem, From what I have seen the lead scraped
    from the bullet ends up in the lube grooves and the gap in front of the gas-check

  11. #41
    Member
    Join Date
    May 2012
    Location
    Far North
    Posts
    4,811
    If I can push 60m reliably with a sub load I'll be happy
    Just like my .22lr but bigger

    At the moment with ballistic tips it's brain shots only @ 20m or less

  12. #42
    Member Driverman's Avatar
    Join Date
    Apr 2013
    Location
    HUTT VALLEY
    Posts
    459
    You have a lot to learn. I recommend that you read the stickies on castboolits.gunloads.com .There is several years of reading there ,in particular look up the posts of Larry Gibson and rpm threshold. I shoot a 200 and 220grain boolit subsonic to 100 m with a 1.5/2.0 inch group (mostly) 1:10 twist powder coated or lubed with Bens Red (lithium based lube) .so it can be done and is a lot of fun.
    Last edited by Driverman; 04-11-2018 at 09:38 AM.
    Moa Hunter and rossi.45 like this.

  13. #43
    Member
    Join Date
    Dec 2018
    Posts
    9
    Too slow a twist for that bullet. Need a faster twist, more MV or lighter bullet. No shortcuts are going to fix it.
    diana2 likes this.

  14. #44
    Gkp
    Gkp is offline
    Member
    Join Date
    May 2018
    Location
    Queenstown
    Posts
    1,578
    Try 10 grains of trail boss. On the flip side a tumbling projectile is still going to kill. Expect to go for head and neck shots inside 100 yards, anything outside of this use a a standard load.

 

 

Similar Threads

  1. 22-250 loads
    By Boaraxa in forum Reloading and Ballistics
    Replies: 37
    Last Post: 23-09-2020, 08:48 PM
  2. 9mm Sub Loads
    By Tikka7mm08 in forum Reloading and Ballistics
    Replies: 7
    Last Post: 29-11-2017, 10:50 PM
  3. 308 Max loads
    By Boaraxa in forum Reloading and Ballistics
    Replies: 26
    Last Post: 07-11-2017, 09:01 PM
  4. 243 loads
    By northdude in forum Reloading and Ballistics
    Replies: 0
    Last Post: 15-11-2014, 04:45 PM
  5. .270 Loads
    By mcche171 in forum Reloading and Ballistics
    Replies: 68
    Last Post: 20-02-2014, 08:33 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!!