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Thread: Casting for a 470 Nitro Express

  1. #41
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    I like this 405 grain Mihec load @ 2000 fps. VV N135. Regulated good @ 50 m, low velocity spread.



  2. #42
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    I put a Leupold Freedom 1,5-4x24 on. The old scope was horrible.

    Checked regulation from ouch @ 75 meters. 405 grain Mihec @ 2000 fps.



    I put the right barrel "on". Then see what the left does.



    Left barrel over-regulates as expected. The bullets cross at ~50 m or so, perfect for practise. I could up the charge and get them closer,re-zero, but my idea here is a plinking load. Fast practise up to 50 m is just fine.



    Each barrel seems to group ok by itself. Merkel did good - and so did Mihec.

  3. #43
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    15 meter,, very cool video! 56 MPH? not bad. Was Gretchen Whitmer chasing you? Almost seems like too much fun!

    We came out of Okemos just east of East Lansing in 1956. I was back in 1958 and 59 for the summer with my dad. Haven't been back since.

    Randy
    "It's not how well you do what you know how to do,,,It's how well you do what you DON'T know how to do!"
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  4. #44
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    Quote Originally Posted by W.R.Buchanan View Post
    15 meter,, very cool video! 56 MPH? not bad. Was Gretchen Whitmer chasing you? Almost seems like too much fun!

    We came out of Okemos just east of East Lansing in 1956. I was back in 1958 and 59 for the summer with my dad. Haven't been back since.

    Randy
    Randy, do you know what the topic is?

  5. #45
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    Is that your own range? Looks like just the one lane and berm, or are there others well separated?

    That is a nice gun! I am jealous!

    Also, a question... It seems most double rifles are set up for same POI at a specific range, I think usually 50 to 100 yards. Why? If the barrels were parallel and shot to POI with a couple inches (50mm) or so between center of groups why would that be a bad thing?

    If I had a double rifle and I could aim at a bullseye at 100 yards and have the right barrel group 1" to 1 1/2" right and the left barrel group 1" to 1 1/2" left (or whatever the center distance is) I'd be quite happy. If you knew which barrel you were shooting you could easily compensate by holding one way or the other a bit. These aren't bench rest guns after all.

    It just seems like trouble to pick a distance and try to make both barrels shoot to same POI there. I guess for the relatively short range the guns are intended for it doesn't really matter but I always wondered why have a crossover point? If you wanted to shoot 200 yards, which isn't really far, you'd have to compensate for the crossover.

    Nonetheless, that's how they seem to be made.

    I am still jealous!

    Longbow

  6. #46
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    Winger Ed.'s Avatar
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    What a beautiful rifle.

    I shot some 405s in .45-70 in a rather light weight Marlin at about 15-1600 fps.
    It took a lot of shoulder rubbing and head scratching to figure out which end of it was more dangerous than the other.
    In school: We learn lessons, and are given tests.
    In life: We are given tests, and learn lessons.


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  7. #47
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    Longbow, that's the way all sxs double guns behave. Regulation is off if the barrels "cross" like here.

    There's only one specific load that goes parallel because the barrels recoil both sideways and up. In this case it is a 500 Woodleigh with 110 grains of Vihtavuori N160 @ 2250 fps @ up to 75 m. Change anything,like powder, and both poi :s change. Even if the velocity stays the same, barrel time and poi's change.

    Regulation changes with the shooter,too. Better british manufacturers let/want the customer to come in and test shoot the particular rifle / load combination. Then regulate accordingly. Your hold & recoil most probably differ from mine.

    So, when I know it regulates within, say 2" up to 75 meters, like this does with 500's, I don't need to think about it. But with these practise loads I have to take what I get, in this case 50-60 meters crossing. Could be much worse.
    Last edited by Petander; 11-13-2021 at 01:14 AM.

  8. #48
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    I thought the barrels were set up to converge at a specific distance with the regulated load. Not so?

    Longbow

  9. #49
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    Quote Originally Posted by longbow View Post
    Is that your own range? Looks like just the one lane and berm, or are there others well separated?

    That is a nice gun! I am jealous!



    Longbow
    Yes this is our local hunting club's cabin / cottage / range. A whopping five minute drive from my home. My winter season is just about to begin.

    Luxury things like this made me move back to the countryside some 25 years ago.

    There are two different, big proper shooting ranges with moving moose targets, trap range, 22 range etc within 15 minutes drive.
    Last edited by Petander; 11-13-2021 at 01:34 AM.

  10. #50
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    Quote Originally Posted by longbow View Post
    I thought the barrels were set up to converge at a specific distance with the regulated load. Not so?

    Longbow
    This is what usually happens at some distance , but , the idea is to make them shoot parallel. Very delicate business, add a scope and everything changes because of the weight change.

  11. #51
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    Okay then, I just did a bit of reading on regulating barrels:

    https://www.africahunting.com/thread...-rifles.54344/

    Something I was neglecting in my thoughts was the recoil effect of the two barrels being offset from the centerline of the gun.

    I wouldn't have thought it would make that much difference but so it does!

    An O/U makes more sense in that regard but I still prefer SxS double barreled guns.

    Interesting stuff!

    Longbow

  12. #52
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    Quote Originally Posted by longbow View Post

    Interesting stuff!

    Longbow
    It sure is!

    A friend of mine had a Merkel 8 mm sxs , I helped with regulating it. There were small hex screws at the muzzle to adjust left barrel poi. I should have bought that gun... he sold it for too cheap imo.

    I used almost 100 bullets when tweaking the gun and load. It kicked quite a bit... horrible triggers... but still kind of nice.

  13. #53
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    Nice that you have good shooting facilities so close to home.

    I can't complain compared to many I guess as we have one reasonably large collection of shooting ranges and archery range about 45 minutes away one way, a shotgun range about 20 minutes away and a small "rustic/spartan" rifle and handgun range about 15 minutes in a different direction.

    It makes things much easier when a guy is working up loads as you are for your double rifle.

    If you had to drive 1 hour or more to get to the range it takes more planning and likely results in less time at the range.

    Your pics of the range, gun and ammunition are very nice... and the targets are looking good too!

    Longbow

  14. #54
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    Yeah, I'm a member in a few shooting clubs. One club meets at a 300 m range, it's a two hour drive for me but worth it. People drive from much longer distances to shoot.

    I bought a 44 mag S&W #29 a couple of years back. Gentleman who sold it lives in southern Finland near big cities ,(big is relative) , he said there's no places where one can shoot a big handgun anymore.

    I even got my own 470 proof bullet trap in that "home range" of mine. I donated the trap to our club, everyone liked the idea. Better be prepared for enviromadness.

  15. #55
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    Quote Originally Posted by Petander View Post
    Randy, do you know what the topic is?
    Petander: I am a known "Thread Hijacker" with many priors.

    I do like your gun. Do you hunt Polar Bears with it?

    Randy
    "It's not how well you do what you know how to do,,,It's how well you do what you DON'T know how to do!"
    www.buchananprecisionmachine.com

  16. #56
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    Quote Originally Posted by Petander View Post
    Better be prepared for enviromadness.
    and collecting lead for recycling!

    How is a .470 bullet trap made... AR plate and sand filled?

    Longbow

  17. #57
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    Quote Originally Posted by W.R.Buchanan View Post
    Petander: I am a known "Thread Hijacker" with many priors.

    I do like your gun. Do you hunt Polar Bears with it?

    Randy
    Mostly elephants.

  18. #58
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    Quote Originally Posted by longbow View Post
    and collecting lead for recycling!

    How is a .470 bullet trap made... AR plate and sand filled?

    Longbow

    There's a cylinder. Everything is made of thick, heavy steel.

    Here you can see the cylinder design. It was built to take 45-70.




    https://www.google.com/search?q=bull...9AdVBll2Ww6ieM
    Last edited by Petander; 11-14-2021 at 03:39 AM.

  19. #59
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    Good idea! with tangential entry there shouldn't be impact damage and no sand to sift through.

    Longbow

  20. #60
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    Quote Originally Posted by Petander View Post
    Randy, do you know what the topic is?
    Randy and I hijacked the thread for a little bit.

    Ice
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    Nice

    Check post #35

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Abbreviations used in Reloading

BP Bronze Point IMR Improved Military Rifle PTD Pointed
BR Bench Rest M Magnum RN Round Nose
BT Boat Tail PL Power-Lokt SP Soft Point
C Compressed Charge PR Primer SPCL Soft Point "Core-Lokt"
HP Hollow Point PSPCL Pointed Soft Point "Core Lokt" C.O.L. Cartridge Overall Length
PSP Pointed Soft Point Spz Spitzer Point SBT Spitzer Boat Tail
LRN Lead Round Nose LWC Lead Wad Cutter LSWC Lead Semi Wad Cutter
GC Gas Check