grandpamac
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1. 
   grandpamac liked post by shooternz On thread : Lapping barrels

   Most high end barrels are lapped before being fitted, The only reason to lap a barrel is if it has a bad copper fouling problem then i would have words with whoever fitted and chambered it, Doing a...

   Liked On: 26-04-2021, 01:55 PM

2. 
   grandpamac liked post by bumblefoot On thread : Getting back to living off the land.....

   A new garden going into the old duck enclosure; that was always going to be a berry cage. The ducks were in there for over 12 months so the nitrogen levels will be through the roof. The idea is to...

   Liked On: 25-04-2021, 08:54 AM

3. 
   grandpamac liked post by Micky Duck On thread : Relationship Between Case Capacity and Muzzle Velocity

   so if you use the issue BACKWARDS..... you can run a 30/06 or 308 and 7.62x39mm or 30/30 velocities at very low pressures EASILY.... you cant go the other way. a friend was trying to get 3000fps...

   Liked On: 22-04-2021, 07:23 PM

4. 
   grandpamac liked post by zimmer On thread : Relationship Between Case Capacity and Muzzle Velocity

   It does and it doesn't. Whilst bolt thrust is better controlled the limiting factor is still the brass case. In my Swede for example that's just over 55000 psi. The outcome of hot rodding is loose...

   Liked On: 22-04-2021, 07:22 PM

5. 
   grandpamac liked post by caberslash On thread : Relationship Between Case Capacity and Muzzle Velocity

   Would brass quality not be a major factor/consideration? I know that the top brass makers (Lapua and more gucci brands like Atlas Development Group) advertise their brass as being something a...

   Liked On: 22-04-2021, 03:07 PM

6. 
   grandpamac liked post by nor-west On thread : Relationship Between Case Capacity and Muzzle Velocity

   So what happens if you use the same load in the AI case as in the original? Do you have a reduction in pressure and speed and does the sharper angle of the AI case shoulder mean less bolt thrust?

   Liked On: 22-04-2021, 03:07 PM

7. 
   grandpamac liked post by ZQLewis On thread : Relationship Between Case Capacity and Muzzle Velocity

   as a 99 shooter I do just have to point out that when the 99 action was modified to take the 308 win family of cartridges it was lengthened and upgraded to the nominal 50,000Cu or 60/62,000psi that...

   Liked On: 22-04-2021, 03:06 PM

8. 
   grandpamac liked post by chainsaw On thread : Relationship Between Case Capacity and Muzzle Velocity

   based on my own experience with 280ai (REM700 action, 24in bbl 1:85 twist) I think 75 - 100 fps gain is about right for the 7mm/280 comps. The exact number (or size of gain) I've found to be more...

   Liked On: 22-04-2021, 03:06 PM

9. 
   grandpamac liked post by zimmer On thread : Relationship Between Case Capacity and Muzzle Velocity

   The shoulder angle has nothing to do with bolt thrust. What determines bolt thrust is the “grippieness” of the case wall. Obviously there will be a small section of the cartridge base that isn't in...

   Liked On: 22-04-2021, 03:06 PM

10. 
    grandpamac liked post by rossi.45 On thread : Relationship Between Case Capacity and Muzzle Velocity

    i remember a kiwi rifle builder was running a very short barrelled ( not exactly sure on length but less than 12 inches ) .308 with 125grn. bullets at what i thought BS velocity . . sorry about the...

    Liked On: 22-04-2021, 03:05 PM

11. 
    grandpamac liked post by Boaraxa On thread : What to pack for a 2 day trip - Kaimais

    I like to travel light i mean whats 1 night in the bush people tend to overthink & take far too much stuff , i wear my main clothes on at all times unless i get wet my spears are simply polly props...

    Liked On: 16-04-2021, 08:00 AM

12. 
    grandpamac liked post by JessicaChen On thread : What to pack for a 2 day trip - Kaimais

    On food, I find mixed nuts to be perfect. High in calories and relatively light for the amount of high quality fat it provides. Rice is also good, anything can be mixed into it to cook. In the end...

    Liked On: 15-04-2021, 05:52 PM

13. 
    grandpamac liked post by On thread : 25-06 why hasn't it achieved fame and success in New Zealand?

    just like the 6.5 06

    Liked On: 13-04-2021, 02:36 PM

14. 
    grandpamac liked post by zimmer On thread : Fast twist barrels

    Here’s article from Accurate Shooter on the topic Twist versus Velocities. How Muzzle Velocity Changes with Different Barrel Twist Rates « Daily Bulletin...

    Liked On: 13-04-2021, 01:57 PM

15. 
    grandpamac liked post by On thread : School me on muzzle threads

    I use a 30 cal suppressor and dont own anything over 30 so dont have to worry about a different suppressor for every different rifle and supression seems to work well

    Liked On: 11-04-2021, 06:49 PM

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