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  1. Marine52

    Bushing or mandrel or both?

    Nice research. Thanks much. You may have already answered this but didn’t see it. Did you moly-lube the necks before mandreling or just before bullet seating ? Or both? Thanks.
  2. Marine52

    130 vs 140+ class bullets for PRS

    For PRS-size targets, you’re not going to see much of a difference ballistically. Just go with the bullet/load that your rifle prefers.
  3. Marine52

    F-class rests

    Yes the Rodzilla and SEB (SEB seems to be most popular nowadays) front rests are amazing for stability, ease of leveling, return-to-battery, and aiming adjustments w/o muscular interference. Combined with a rear bag like the SEB Bigfoot, you are at Benchrest level stability. F-Open is a deep...
  4. Marine52

    Need conformation using JMB ballistic calculator zeroing at 100yds.

    Yes, 1.7” low at 25 sounds about right but that’s a roundabout way of doing it. Normally, just enter 100 yards as your zero and put range increment at 25. The calculator will show your required 25 yard point of impact for a 100 yard zero. With your sight height of 2.8 inches, the bullet...
  5. Marine52

    Rifle Scopes Does long road trip cause a shift in zero ??

    Here‘s a related thread you may find interesting: https://www.snipershide.com/shooting/threads/official-accuracy-international-cold-bore-return-to-zero-thread.7205557/
  6. Marine52

    Rifle Scopes Does long road trip cause a shift in zero ??

    Here’s the elephant in the room. Is this is factory rifle? Have you removed and reinstalled the barrel before with any zero shift? Factories usually torque down the barrels way more than needed so that ordinary owners cannot remove them easily. When you put the barrel back on, recommended...
  7. Marine52

    Vertical Spread

    Assuming your load is solid, as you say, recoil management is crucial. At 1000, you must have consistent cheek pressure, shoulder pressure, and trigger pull. Also, rifle tracking in the rear bag is important as well as what your bipod is resting on. Before your first shot, put downward...
  8. Marine52

    Differential Equations and Ballistics?

    @Cheetah, here’s the errata sheet for the first edition: http://www.dexadine.com/download/mccoy10.pdf
  9. Marine52

    Differential Equations and Ballistics?

    Yes you will enjoy McCoy’s book. It is the Bible of exterior ballistics and the kinematic equations of projectile motion. Litz is a very good ballistician but, as said above, his books are purposely not as rigorous mathematically.
  10. Marine52

    Looking for general hunting gun for Florida hogs and deer.

    Yes 6.5 Grendel is light recoiling, accurate out to 500 with long barrel life. It falls short of the 6.5 creedmoor ballistics, as I’m sure you’ll hear, but the barrel life is better and it sounds right for your needs. I have one in an AR and it is my fun gun. The 308 will have good accuracy...
  11. Marine52

    . 308 over Pressure or bad chamber

    read @spife7980 post #11. Find your rifle headspace and work from there.
  12. Marine52

    Fired brass same size as unfired

    The 1.4666 - .0070 shown by SAAMI is not the headspace. These are the SAAMI cartridge dimensions. The SAAMI rifle headspace specs for a 223 rem are 1.4636 (min) to 1.4736. (max). A Go Gauge should be at SAAMI min. Get a Go Gauge from a good company like Manson. If your rifle bolt will not...
  13. Marine52

    Fired brass same size as unfired

    You need to find your rifle headspace or else you will be chasing random shoulder bumps. Get a Go Gauge for the 223 rem. I use a go gauge and then use aluminum foil on end with a smidge of paste to find exact headspace (reg foil is about .0004 - .0006” and heavy foil is right at .0008”). I do...
  14. Marine52

    Fired brass same size as unfired

    Is this a bolt gun?
  15. Marine52

    Redding competition seater scratching bullets

    ^^^this is correct. The scratched area in red is the bullet’s bearing surface. It is the max diameter of the bullet. The seating stem should be nowhere near this. The seating stem normally contacts the ogive closer to the tip and in the vicinity of the red area. You have a die that is out...
  16. Marine52

    New Trimmer Advice

    I second this. I love my Giraud but, as noted, your hand gets worked and if you have arthritis in the thumb joint and wrist as I do it can get annoying after 200 cases. But as noted a glove helps. The Giraud indexes off the case shoulder which I believe is the way to go. The Henderson is a...
  17. Marine52

    The Marines

    Sounds like he’s never been under hard stress. You have to be physically fit but the mental aspect is what will break you. Hard to tell before hand. I’ve seen tough looking guys fall apart and whimpy looking weak kids rise to the occasion. I’d say go for it.
  18. Marine52

    Special council: Biden mentally unfit to prosecute!!!

    Exactly. Biden doesn’t need a functioning brain. In fact, a demented fool to use like a rented mule is exactly what the evil serpent wants
  19. Marine52

    Shot show 2024

    In the video, Mark indicates the press is a combination of steel and alloy. Any idea what parts are steel and what parts alloy? Is it mostly steel or aluminum?
  20. Marine52

    .308 Winchester load data using small rifle primers

    recommend you sell the SRP brass to a buddy. For hunting, I would stick to LRPs. There are a lot of reported issues with the small primers in very cold weather. I’m not negative on the small primers—I use them for f-class comps—but for hunting, I want the assurance that there will be a bang...
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