Page 1 of 2 1 2 LastLast
Results 1 to 10 of 17
  1. #1
    Banned
    Join Date
    Aug 2010
    Location
    Port Elizabeth
    Age
    55
    Posts
    11,588

    Default FN 308 Who knows what works for accuracy

    picked up a old FN in a realy worn external shape.No blueing left -- wet- rotted stock and a barrel action that rattled in the stock.Blued the metal - Filed and neatened, polished the action - filed squared polished and worked trigger, Bedded the action up to the chamber floated the barrel and tested some ammo.Using 165 Hornady BTSP PMP S335 and PMP large rifle primers I get 2 shotsgroups of 1" and the third always a bit wider at 100m. good enough for hunting, dont like that. Any tips. Full bed barrel ?/
    How do I get better on a 308 Fn.To me 6 hots in a match box is a rfle that is right.

  2. #2
    . Ross's Avatar
    Join Date
    Sep 2008
    Location
    Where I need to be
    Posts
    1,285

    Default Re: FN 308 Who knows what works for accuracy

    What condition are the lands and grooves in?
    Have you removed all the copper fouling from the barrel?
    Try having the muzzle recut to an 11 degree target crown.
    Bullet seating depth can have a large impact on accuracy.
    He is best who is trained in the severest school! Fear no man.

  3. #3
    Banned
    Join Date
    Aug 2010
    Location
    Port Elizabeth
    Age
    55
    Posts
    11,588

    Default Re: FN 308 Who knows what works for accuracy

    Lands -grooves like new- crown still unmarked. We had a 1mm jump and made it 1.5mm today and the group has tightened.Funny thing is it shoots best with pmp max suggested load --- no pressure sighns at all - wondering if I should up the load as well

  4. #4
    Banned
    Join Date
    Dec 2009
    Location
    Vereeniging
    Age
    70
    Posts
    5,782

    Default Re: FN 308 Who knows what works for accuracy

    The 2 close and one wide shot sounds like something touching the barrel when it gets hot. You really need a chrony to record speeds as chambers differ and only speed will show what is really happening. Changing the COL = seating depth is the way to get your sweet spot. Get all the parameters and then a prediction can be made.

  5. #5
    Banned
    Join Date
    Aug 2010
    Location
    Port Elizabeth
    Age
    55
    Posts
    11,588

    Default Re: FN 308 Who knows what works for accuracy

    Chroni = 2551/2545 ft/ps COL 70mm well bedded to end of chamber barrel over floated to be sure 2mm gap. 2 tight 3rd wide and then Ok -------&^%$%$#&% got me and many baffled -- its so predictable even with other shooters.

  6. #6
    User
    Join Date
    Oct 2010
    Location
    /\/¯¯¯¯¯\/\
    Age
    43
    Posts
    10,754

    Default Re: FN 308 Who knows what works for accuracy

    maybe the powder dispenser is off?

  7. #7
    User
    Join Date
    Jun 2009
    Location
    Inne Cape
    Age
    65
    Posts
    2,525

    Default Re: FN 308 Who knows what works for accuracy

    Does it have a mauser type exractor? If so check for contact marks on the outside of the extractor. In a discussion elsewhere this was found to be the cause of flyers.
    How long do you wait between shots?

  8. #8
    Banned
    Join Date
    Aug 2010
    Location
    Port Elizabeth
    Age
    55
    Posts
    11,588

    Default Re: FN 308 Who knows what works for accuracy

    Tell me me Thomas --- this is what I been lookin for a new - or little known factor. Done all the obvious.Where on extractor - what they look like and what was done about it.

  9. #9
    User
    Join Date
    Jun 2009
    Location
    Inne Cape
    Age
    65
    Posts
    2,525

    Default Re: FN 308 Who knows what works for accuracy

    On Mauser type extractors (with the big extractor claw) You sometimes find a contact between the outside edge of the extractor and the barrel, which could lead to irregular contacts and cause flyers. Put some Indian ink on the outside of extractor and cycle bolt. If there's a shiny area in the Indian ink, relieve carefully. Maybe better to have a gunsmith check it out..
    Is your bedding stress free?

  10. #10
    Banned
    Join Date
    Aug 2010
    Location
    Port Elizabeth
    Age
    55
    Posts
    11,588

    Default Re: FN 308 Who knows what works for accuracy

    Stress free bedding explain. --Nice this................. two new things learnt for me -- Seems you know all the I dont knows.Gonna check out this extracter thing toniht. But pray do tel in regard stress free.

Page 1 of 2 1 2 LastLast

Similar Threads

  1. Bench rest accuracy versus field accuracy.
    By TStone in forum General Hunting Discussion
    Replies: 19
    Last Post: 14-02-2015, 18:54
  2. H&K. It works better wet.
    By 414gates in forum Handguns
    Replies: 6
    Last Post: 22-03-2012, 23:42
  3. THE 30-06 It Works So Well
    By Pathfinder in forum General Firearm Discussion
    Replies: 22
    Last Post: 03-04-2011, 01:02
  4. G23 works after being struck by 9mm
    By streak in forum Scenarios and Tactics
    Replies: 31
    Last Post: 11-02-2010, 06:42

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •