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  1. S

    Will a 40 MOA rail work?

    You're on the factory preset zero stop, that scope has nearly double that travel. Its nearly centered in its travel, so there is no need to move the turret for storage. I have one on a 338 RPR with a 20 moa one piece mount on top of the 30 moa factory rail. It has over 32 mils (110 moa) up...
  2. S

    Hornady 338 300 grain A-Tip

    Hard to fault a pragmatist..... I'm an old engineer and compulsively suck the fun out of everything.
  3. S

    Hornady 338 300 grain A-Tip

    What's your process for sighting in the CT? I have a 30 mil version. It's currently mounted on my 6XC to allow testing at closer ranges.
  4. S

    Hornady 338 300 grain A-Tip

    What is your setup to get the required elevation? Looks like stacked bases in the picture?
  5. S

    Hornady 338 300 grain A-Tip

    2 miles is a pretty fair poke..... The Weighting Factor adjusts the relationship between velocity and peak pressure. If you leave it constant and model larger and larger case volumes, you'll find that it exaggerates the overbore effect. Pressures go up, but velocities don't. A couple years...
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    Hornady 338 300 grain A-Tip

    My first ladder started at 87.0 grains. It was based on the start pressures I'd seen for that bullet with the 33xc. This ladder started at 91.0 grains which gave 2722 fps, with an ES of 10 and SD of 5.2. 92 grains gave 2756 fps with an ES of 16 and SD of 6.0 for 5 shots. It also gave the...
  7. S

    Hornady 338 300 grain A-Tip

    The only thing that produces velocity is pressure and peak pressure does it much better than mean pressure. Have you ever calibrated pressure signs to an actual pressure measurement? I haven't. I use a blade micrometer in the extractor groove during pressure ladders with new brass to get an...
  8. S

    Hornady 338 300 grain A-Tip

    I've had pretty good luck with the QL H1000 data. This is for the 300 ATip from a 338 Lapua RPR.
  9. S

    Hornady 338 300 grain A-Tip

    Thanks For 2308 yards, Shooter with a 0.448 G7 gave 24.3 mils and 0.7L. The Hornady 4dof gives 24.3 and 0.6. This is the only confirmed data I have. For 1760, Shooter - 14.7, 0.4L, 4dof - 14.5, 0.4L For 1000, Shooter - 6.0, 0.2L, 4dof - 6.0, 0.2L It looks like the bullet beats a 0.448 G7...
  10. S

    Hornady 338 300 grain A-Tip

    Use a bullet in a drill as a lap for the seating stem. 400 grit or finer for the lapping compound. You can also go the other way and bed the stem with epoxy. Sometimes it's the edge of the hole for the bullet tip. That can be knocked down with a small cratex bit in a dremel. The thing that...
  11. S

    Hornady 338 300 grain A-Tip

    I wouldn't expect a BC estimated from one point deep in the transonic to be the one to use if you're shooting relatively short distances unless the bullet's drag curve closely matches the G7 curve. The reason I mentioned it is if you're shooting them long distances, starting with the BC on the...
  12. S

    Hornady 338 300 grain A-Tip

    The back story on the solid bullet freebore in the jacketed bullet rifle is I started the 33xc project with the intent of testing solid bullets in it. I chamber my own barrels so bought the 1:9.3 barrel that's on it off the shelf to get the ball rolling with load development while I waited for...
  13. S

    Hornady 338 300 grain A-Tip

    33xc using the solids reamer with the shorter freebore. The ATips are loaded 5 thou into the lands at 4.215. 30" Bartlein 1:9.3 MTU profile. 115 grains of 24N41, 215M primer, Tubb brass on its 6th firing. The brass will take another 75 fps, but this one bugholes and gives the best velocity...
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    Hornady 338 300 grain A-Tip

    I was finally able to test them at distance a couple days ago. I came up with a G7 of 0.448 for the whole trip to 2300 yards. The bullet was almost down to 1100 fps. G7s for higher velocities/closer distances will likely be higher. The BC isn't really the point, it's an added benefit. They...
  15. S

    School me about 300 Norma Magnum

    Thanks for the help, I was wondering if I was missing something obvious. Yea, Retumbo has been the way to go for me as well. 86.0 grains of Retumbo, 215M primer, New Lapua brass, 230 ATip gave 3103 fps from a 32" 1:8 Barlein. The extractor groove opened up 0.000 4", which usually gives me...
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    School me about 300 Norma Magnum

    What are you using for powder? I'm just about out of Retumbo.
  17. S

    300 prc vs 300 norma mag

    The ADG brass has 4-5 grains of water less capacity than the Hornady, so you're down to pretty much 300 Win Mag case capacity with brass that costs twice what decent 300 Win Mag brass costs.
  18. S

    Gunsmithing 338 LM on a Rem 700

    Has anybody ever seen a R700 shear the lugs off the bolt? Then why do we keep talking about the bolt? When the lower lug gets set back, it's not the lug getting bent over back into the magazine well or shearing off the receiver, it's the receiver stretching at the bolt hole just in front of...
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    Who's got time and experience behind a RPR in 338L

    I have 2 of them. I bought the first one the week after they became available and rebarreled it to 300 Norma before shooting it. I bought another one a few months ago and have been shooting it with the factory barrel. It's a 3/4-1 moa gun so far. The only Christensen Arms I've seen shoot was...
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    Rebarreling a Small/Standard Shank Savage to 6.5 PRC?

    That bolt head can't be compatible with everything listed by Midway. The tenon behind the cross pin is shorter on the short actions. Compare the length with yours when it arrives. I shortened a long action magnum bolt head to work in a Model 10. PTG will let you order them with any bolt face...
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