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Thread: lee 160-312tl/2600fps+ part 1 pc'd bullets

  1. #1
    Boolit Master Forrest r's Avatar
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    lee 160-312tl/2600fps+ part 1 pc'd bullets

    Finely got some time to start using a old 308w puma rifle that I re-barreled again to test a slower twist this time. Installed & tested the new bbl the other day, like what I saw so I bedded the stock.

    Had a batch of the lee 160-312tl bullets I cast awhile back. I gas checked all of them and them pc'd part of them and used traditional lube on the rest in a lyman 450 sizer. I used ltb blue and 1 coat of 45/45/10 on the traditional lubed bullets. All bullets had home made al gc's installed and the pc'd bullets were sized to .311" with a lee push thru sizer. The traditionally lube bullets were sized to .311" in a lyman 450.

    I didn't spend a lot of time sorting the bullets, was just casting plinking fodder and picked out any obvious flaws.
    [IMG][/IMG]
    The cases used were nothing more than mixed nato range pick-ups, have no idea how many times they've been reloaded.
    Used H335 for powder, not the best choice by any means. Figured I was taking the bbl out for it's 1st run and wasn't sure what to expect with the plinking bullets/plinking cases.
    Had some magnum large rifle primers laying around, no idea how old they are.
    Used a filler (pillow stuffing)with all loads, the filler was up to the start of the necks of the 308w cases loosely packed on top of the powder.

    Was 30* out with 7mph winds out of the west. Did 10-shot groups that were actually pretty surprising. As the velocities went up the sd's and es's shrank and so did the groups. The 37gr/2679fps load was 2 1/4" outside edge to outside edge. I'm sure with a little tuning/tweaking it wouldn't be hard to shave a little off that group.

    [IMG][/IMG]

    Pretty impressive for the 1st time out with the new bbl actually testing loads with only 4 fouling shots from a clean bbl. Need to re-test the 37gr load and do a 38gr string just to see if the groups keep tightening up.

    Anyway, not a lot of people shooting pc'd bullets in the 2500fps+ range. So far 2650fps+/2" 10-shot groups are doable.

  2. #2
    Boolit Grand Master


    Larry Gibson's Avatar
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    What was the new barrels twist?

    Looking good.......
    Larry Gibson

    “Deficient observation is merely a form of ignorance and responsible for the many morbid notions and foolish ideas prevailing.”
    ― Nikola Tesla

  3. #3
    Boolit Master Forrest r's Avatar
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    Quote Originally Posted by Larry Gibson View Post
    What was the new barrels twist?

    Looking good.......
    Larry,
    I can't thank you enough for your input in these threads and for staying the course so you can aid/encourage others to push the limits of cast bullets in high powers.

    Awhile back I asked about a 1 in 14 twist with a .340" match chamber. You replied to thread stating that bbl would be a good all around choice for cast and up to 168gr jacketed. I was actually looking at cast and 155 jacketed. You've forgotten more than I know when it comes to cast bullets in the high powers. So when you posted it was a good choice I ordered 1.

    1 in 14 twist, 300/308, match 340" chamber, 30", tapered to the muzzle.

    Again, I can't thank you enough Larry.
    Took the bbl out for the 1st time with mixed brass, old primers and a bullet most people don't like to use, then pc'd it and put it with a powder that most people consider bad for cast bullets and got a 10-shot 2650+fps 2" group.

  4. #4
    Boolit Grand Master


    Larry Gibson's Avatar
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    That's an awesome set up, wait til you refine the loads a bit, you'll be amazed.

    My pleasure to help. Merry Christmas to you and yours......
    Larry Gibson

    “Deficient observation is merely a form of ignorance and responsible for the many morbid notions and foolish ideas prevailing.”
    ― Nikola Tesla

  5. #5
    Boolit Grand Master popper's Avatar
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    H335 works fine. 1:10 carbine @ ~ 50yds, chronyd 2450 fps. 165gr cast. prone with bipod @ 34F.
    Attachment 210343
    Whatever!

  6. #6
    Boolit Master Forrest r's Avatar
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    Quote Originally Posted by popper View Post
    H335 works fine. 1:10 carbine @ ~ 50yds, chronyd 2450 fps. 165gr cast. prone with bipod @ 34F.
    Attachment 210343
    Are those the 35gr loads?

  7. #7
    Boolit Grand Master OS OK's Avatar
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    I like that 36 grain group, looks like 7 within 5/8''s ~ 3/4" vertical dispersion, prolly within .5~.8 grains to a node...especially now that your gonna get a little picky with the casts.

    Very nice work right off of the bench for the first time.
    a m e r i c a n p r a v d a

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    “In a time of deceit, telling the truth is a revolutionary act.” G. Orwell

  8. #8
    Boolit Grand Master popper's Avatar
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    39gr. AR10 carbine. 4895 gave same fps. Alloy is 4% Sb & 0.5% Cu, WD. 24" upper runs 2700 fps, same accuracy. That target was from a really nasty shoot, after a sleet storm, laying on gravel with hand under stock for elevation control. Bout froze my rear off. Had just got the carbine upper, so good results.
    Last edited by popper; 12-27-2017 at 11:23 AM.
    Whatever!

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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