ocw

  1. Max_The_Phoenix

    How long do you wait between shots

    Hi Everyone How long do you wait between each shot on a 5 shots string for grouping and measuring es/sd? The goal is to have a group size under 0.5” and the load is not gonna be for hunting, just target. I have been reading on forums that you have to wait 3 minutes between each shot😵‍💫...
  2. Podigga

    OCW Results: Any Help is appreciated

    First time running the OCW test. Looking for help determining best node/ load. Would really appreciate everyone's help. Rem 700 26" Barrel Lapua Brass CCI 450 Primer Lapua Scenar 139gr. .010 off lands. 100 yards. MV 39.0 - 2679. 39.5 - 2705. 40.0 - 2735 40.5 - 2761 41.0 - 2785 41.5 - 2819 42.0...
  3. darth_ritis

    would seating depth affect the OCW?

    I'm trying an OCW test to find the best recipe for my rifle. I've got the powder charge test done, and now I'm ready to test seating depths. I was wondering if changes in seating depths, and the related changes in pressure, might have any affect on the OCW? I don't want to do another charge...
  4. doctordoctor

    OCW Interpretation 175's and 155's with Varget

    I know that .5 grain increments is not ideal but it is what it is. I will post the results below. Let me know what you guys see and interpret. I will state my results below. 175 SMK's: COL 2.800" NEW Lapua Brass tested 42-45 grains. My interpretation: I see 2 nodes. Low being...
  5. doctordoctor

    Sorry Another OCW results question 4064 175's

    Hey guys where would you pick up for step 2 of testing? I am also tempted to maybe try to see if there is a higher node above 45 as I had no pressure signs...yet. As always THANK YOU!!! I think I find a node 42.5 to 43.5 maybe up to 44grains if it wasn't for that darm flinch shot which I...
  6. kaskin

    "Reading" OCW Targets

    I finally had time to go to the range and shoot the handloads in OCW round robin style. Hard part is I can't figure out which charge is the most stable. I want to say the flyer in 25.8 was me or ,,, maybe just wishful thinking lol Oh yeah this was at 50 yd 223 AR 15 Any help would be...
  7. texasplinker

    OCW SMK 77 and CFE 223

    Fortunately, central Kentucky weather was kind to me today and gave me a day with decent enough weather to run my first effort at an OCW exercise. It took longer to make the shots than I would have guessed. Also, shooting round robin seemed to make me focus on my form and consistency more than...
  8. doctordoctor

    OCW Test: About to embark on my own 308 adventure

    So I have decided to work up some loads for my Rem. 700 XCR long Range Tactical .308, 26” bbl, 1:12”. My OAL for this particular rifle is (using a comparator) 2.360” The previous load I developed and have been using is 175 SMK’s in Winchester or FGMM brass loaded with 44.7 gr. Varget CCI BR2...
  9. TeaRex

    6.5x55 OCW - IMR 4831 and 4350 Berger 140 Hybrid

    Hello All, Just got back from the range with my first attempt at an Optimal Charge Weight test on my new 6.5x55 Swede! Specs: Remington 700 LA, blueprinted 24" Bartlein Med Palma 1:8 twist (round count = 40 at beginning of test) Berger 140 Hybrid 2.473 coal to ogive (0.010" jump) New...
  10. M

    Question about harmonics and OCW tests

    Hi Guys, Question here. I am wondering about OCW tests conducted using different seating depths of a projectile. Let's say I want to do an OCW test, so I load up my rounds and set the ogive to base length to a certain distance (we'll call it X) using my micrometer die. Then I go shooting...
  11. glock24

    First OCW - please help me analyze

    SH, I was first introduced to this OCW process while reading this thread, including <span style="color: #3366FF">komboyatch's </span>informative tutorial. Thanks to all for this valuable info! My last tuning process involved too much trial and error, so I'm delighted to gain this insight...
  12. Grump

    OCW with an M1A?

    Should I run the OCW test at 200 yards instead of 100? Any insights into OCW with this gas gun? Here's why I ask: Got some more bullets to test, trying to tweak things into a reliably sub-MOA load or two. Past OCW tests have been mixed. One was mucked by a loose scope mount. One before that...
  13. P

    Reading OCW Plots

    Was reading quite a bit on this site and learning a ton. I'm trying to develop a good load for my .308 700 VS. I've gotten pretty good results at 100 yds with 168 SMK's (.5 moa). But want to use the 175's for longer distance. Have a Mk4 M3 so want something to semi track with the dials...
  14. A

    OCW and velocity with different brass

    Once you find OCW for a given brass, is it a general rule of thumb that if you change brass (lower or higher capacity brass) and load to achieve the same muzzle velocity then you are also at OCW for the new brass? (i.e.: once you have found OCW, just aim for that same velocity regardless of...
  15. J

    Analyze this OCW target

    Finally put together an OCW load for my 24" Savage 10FP .308, and was able to try it out today. Gun is a Savage 10FP in a Choate stock, with a Falcon Menace 4-14x44FFP scope. Distance was 200 yards, and I waited a minimum of 30 seconds between each shot. I used BHA Match cases trimmed to...
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