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    Blown Up Rifle, Lessons To Be Learned.

    If the charge is small enough, the weight variation between loaded rounds may make a double charge tough to pick out. When choosing powder, try to pick one where a double charge won't fit into the case. New bolts are expensive - eyes are something else. I have told this story before. There...
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    Blown Up Rifle, Lessons To Be Learned.

    Having seen two guns blown apart with injuries, I am very happy that the shooter received only minor injuries. Once again small mistakes can have big consequences. I'm wondering about my understanding of the pressure vectors when the trigger is pulled. Ok, so the primer fires up a lot of...
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    Wild flyer?

    I have been bitten by the loose scope base and ring screws a few times - same symptom, fliers. Torque the base screws (15 inch pounds), ring-to-base (60 inch-pounds), and ring screws (15 inch-pounds). Use loktite. Numbers are for Badger Ordnance rings and base. Check the bolts holding...
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    How is RCBS in business?

    I predict that you have never worked for IBM Global Services.
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    Advanced Marksmanship Formula for correcting Elevation on misses

    Nope, we got it. In the distant past, was that called "lash"? Really easy to see on a lathe when the cross-slide threads are worn. regarding: "is there a formula" - your scope is an aiming device. Assuming a first-focal-plane scope or a 2ff set correctly, if your impacts are five tenths...
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    Does rain reduce computed drop?

    re: lights - nope. This is near southern Michigan. Winter brings gray skies - rain is not that different. I shoot in it all the time. Barrel is Bartlein, about 300 rounds. For me, Bartlein barrels are The Best. I read on here that sometimes when a barrel breaks in, it gets a little...
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    Does rain reduce computed drop?

    300 PRC, at 1k I am still running 1,725 FPS. I'm thinking a 230 grain bullet fired from a 308 running at 2700 FPS would be pretty miraculous. There is no room for the powder I agree, it could have been me but ... I fired 25 rounds. Because I started at +7.7 and I was by myself to there was...
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    Advanced Marksmanship Formula for correcting Elevation on misses

    yeah well maybe. It depends on why you were four tenths low. If it was you, then dialing four tenths up and doing a better job on fundamental will results in hitting ... four tenths high. If your load is good and the gun can shoot to plus or minus a tenth and you are shooting good data at a...
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    Does rain reduce computed drop?

    Yeah ... no. According to AB, 100 mph will give me 0.2. Enough tailwind to cause six tenths would blow the building down, I'm pretty sure I would have noticed. The range is Youngs in northern Indiana. From the firing line out to about 450 there are berms and trees and the wind does blow up...
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    Does rain reduce computed drop?

    In non-rainy weather, AB is right on. I used a Kestrel to determine temp, RH, and pressure. I used this technique to determine MV: shoot every 100 yds out to 1k, write down the scope adjustment for each distance. AB knows about the bullet and the barrel. Pick a MV and compute trajectory...
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    Does rain reduce computed drop?

    Shooting last Sunday. Conditions: rain visible in scope - moderate rate; 49 F ; 68 % RH; 28.24 inHg absolute. Bullet: Hornady, .308 230 gr A-Tip, 2700 FPS, barrel 1:9, scope height 2 inches. The rain was not falling straight down, I needed about 0.4 right most of the time - range 0.2 to 0.8...
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    Runout in size die body - Does it matter? Probably not...

    Thinking out loud ... you said, "After alignment, concentricity of the exterior body was found to be perfect from top to bottom - but the interior showed 0.002" runout." Your friend aligned the outside of the die. Since the runout was zero, we can conclude that the die body was round and that...
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    How is RCBS in business?

    Back when dinosaurs roamed the earth I went to work at a company with an IBM System 3 Model 15D - this was a long time ago, you could see the marks where Fred and Barney has chiseled the gears. The IBM systems guy tells me this story. The machine was installed and it started out flakey, they...
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    What makes a bullet accurate?

    "What makes a bullet accurate?" Accuracy is: when you aim exactly at X, all your bullets land in exactly the same place, relative to X. What can go wrong? A bullet moves through air so there are aerodynamic forces. Drag slows the bullet, drag force changes with velocity. If that air is...
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    What makes a bullet accurate?

    Where did your bullet design come from? Bryan Litz (and many others) wrote about bullet design including elements like center of gravity. Since you aren't using jacketed lead bullets you probably can't use a lead bullet shape. If I recall correctly the shape of the nose and boat tail...
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    Neck Tension

    This is too long. Oh well. I use Redding or Wilson full length dies with a button. For 308 and 300 PRC, the button leaves the neck ID at about .303. I mandrel up to .305. The bullets are .308. After seating the bullets, the neck ID is the same as the bullet. After reading this thread, I...
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    300prc vs 300norma improved

    Given Hornady a-tips and a 10 mph full-value wind, Applied Ballistics says: 3150 fps gives a flight time of 3.113 seconds, 2.5 mils of wind, and a terminal velocity of 1181 fps. 3050 fps gives a flight time of 3.249 seconds, 2.7 mils of wind, and a terminal velocity of 1123 fps. + 136...
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    300 PRC Die Question

    21st century. I get .305 +- .001 usually better than ,001.
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    Solid rest recommendations

    With a good rear bag, a decent bipod, and good fundamentals, you should be able to make accurate shots. I shoot threes (okay, big threes) shooting prone while using a Harris bipod, rear bag, and a 300 PRC (it has some recoil). If you are going for groups smaller than that, a front rest may be...
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    Reloading for multiple rifles of same cartridge

    Given the social applications of a 12-inch AR-ish weapon, you want that one to go BANG and cycle EVERY time without fail. So thinking about the 6.5 Grendel, seems to me that getting ammo to function in the 12-inch gun will be harder than the other two barrel lengths. So load to the most picky...
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