270 Win and 165/175 Matrix Range Report

Discussion in 'Rifles, Bullets, Barrels & Ballistics' started by cowboyarcher, Aug 3, 2013.

  1. cowboyarcher

    cowboyarcher Well-Known Member

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    Well finally was able to lay hands on the 165 and 175 Matrix and got out this morning to do some testing on them. Load and climate data are on the target:

    [​IMG]

    As you can see I hit the upper limit with the 165's and H1000. There were no pressure signs at 58gr, but at 59gr there was sticky extraction and extractor marks on the case head. I did not hit the max end with the 175's, but was pleasantly surprised to find that they would indeed stabilize out of my rifle. I stopped at 54gr as that is all I had loaded. Any guess as to where I might hit pressure signs?

    I do not have a chrono so I cannot provide speeds on these yet. . .

    The rifle is a Model 70 that has been worked over some. Barrel is a 1:10 twist McGowan, 24", SS, #2 Shilen contour installed by Sin Arms. Stock is a B&C ultralight medalist. Scope is a Nikon Monarch 4-16x42. Rifle as pictured is 9.5lbs:

    [​IMG]

    God bless fellas!

    Adam
     
  2. FEENIX

    FEENIX Well-Known Member

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  3. cowboyarcher

    cowboyarcher Well-Known Member

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    I did try some H4831sc a few weeks back (you can see one of groups below the yardstick) and it would not group under about 1.5"... The H1000 was new to me at the time so I only had one load to test. That load showed promise and led me to run these today.

    This rifle really does well w/ H4831 and a 140 NAB, so it'd be nice if I could use the same powder. Maybe when I get into the winter and get some more bullets ill do some more work with it.
     
  4. FEENIX

    FEENIX Well-Known Member

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    Sorry but I couldn't make it out before. How far are you off the lands? Mine like them touching or very close to the the lands.

    My best SD however is with H1000.
     
  5. cowboyarcher

    cowboyarcher Well-Known Member

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    No worries, my handwriting is not the best!

    I have not measured the distance to the lands as I wanted to be able to shoot these from the mag. They are as long as possible to fit my box...
     
  6. cowboyarcher

    cowboyarcher Well-Known Member

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    Well I tried to get out this afternoon and run some drop tests to figure velocity from, but I must have had my zero set wrong. My bullets were basically hitting the same groups at 100 and 200 yards. . . I may have to rezero the scope and runs the tests again.

    I did load the 175's up some more (up to 58gr of H1000) and was very surprised that I still was not getting pressure signs. These were still grouping down around the 5/8 MOA mark.

    Anyone near Laramie have a chronograph and want to help a fella out?
     
  7. HarryN

    HarryN Well-Known Member

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    Thanks for posting this, it gives me hope for my own rem 700 / .270 win.
     
  8. cowboyarcher

    cowboyarcher Well-Known Member

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    Finally some velocity numbers for the 175's for you guys. By shooting at 300 and 400 yards and then working back I was able to calculate that the 175's over 58 gr of H1000 are leaving at about 2710 FPS, based on the average drop from 3 shot groups using a BC of .680. These maintained sub-MOA at 400 yards. I have not hit any pressure signs with these yet, so I may work them up more when I get another batch of bullets.

    The 165's jumped up to 2 MOA at 400 yards, so the average drop was not a very precise way to calculate speed in my opinion. I was disappointed in these, and am out of them, so I'll concentrate on the 175's for now.

    Here is the target:

    [​IMG]
     
    Last edited: Aug 13, 2013
  9. Long Time Reader

    Long Time Reader Active Member

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    Please keep testing. I'll be glued to this thread.

    -Thanks!
     
  10. cowboyarcher

    cowboyarcher Well-Known Member

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    Please send a chrono lol!

    But seriously, I think I will use these this year on elk if I don't fill by tag during archery season. I might try and thump a goat with them too if my other project is not completed in time for that.
     
  11. Long Time Reader

    Long Time Reader Active Member

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    1984nitro or nitro1984 was using the 165 matrix and RL-17 and getting 2889 fps using little powder. He was getting groups right at 1 inch.
     
  12. cowboyarcher

    cowboyarcher Well-Known Member

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    3 shots over a loaner chrono tonight averaged 2840 FPS. That's the 175 over 58 gr H1000 in a 24" McGowen tube.
     
  13. Long Time Reader

    Long Time Reader Active Member

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    What's the twist rate and number of grooves?
    Any pressure signs?

    Thanks for posting!
     
    Last edited: Sep 19, 2013
  14. Long Time Reader

    Long Time Reader Active Member

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    That's some good velocity. I hope Berger is working on a 180 gr in addition to their 170 gr that's long overdue.gun)