Recent content by dodgefan

JWP I'm not sure if this is what you're looking for, but the definition of a ballistic coefficient's standard reference projectile is "1 inch in diameter, weighing 1 pound, OF THE SAME SHAPE". Here's a pretty good link to some good ballistics info. RSI - Exterior Ballistic Coefficients

Another good thing about LoadBase is that if you have a scope that doesn't track exactly like the turrets say they should you can output the data in actual turret movement. My Sightron S3 moves about .28 per click as an example and when you start talking 20 moa+ (80 clicks+) that adds up to a...

JWP Check this link out it should have what you want. Drag Model Shapes

Lot of good info mentioned, but nobody said anything about primers yet and they have a fairly significant effect on ES and SD. You might try a different type of primers. If the rifle is older a weakened main spring can also be a cause of high ES and SD.

I asked this question before on another site and and least one poster says the Farrell mount is for an older model M77 without the integral bases. You might want to confirm it with Farrell just in case. Leatherwood actually has one for the integral bases, but I have no idea what the quality is...

When I sized it down I didn't do anything but a straight neckdown. I bought a set of 30 Gibbs dies from Huntington Die Specialties. At first I used 308 win dies because of the slightly sharper shoulder. I tried the seat a bullet out well into the lands method and it worked but I had...

I ran a 30 Gibbs for a few years and the best way I found to form brass was to neck down 35 Whelen cases giving a false shoulder and then fireforming with a good stout 30-06 load. I'd have to check but I still might have some 35 Whelen brass sitting around somewhere.

Diriel I was just curious more then anything. I had bought 500 Lapua 6.5x55 cases and out of that 500 I had 5-10 that had some anomalies and I was wondering if you had run into the same thing. I had my chamber reamer made for Lapua cases so I stay away from the Rem and Win stuff ( base and neck...

HDBLACKNT I think your son will like the new rifle. Don't forget Nosler offers the Partition in 100 gr for even less recoil if necessary. Diriel If you have had a problem with your Lapua brass I suggest you PM Kevin Thomas about he posts on this board and if there is an issue he will take care...

Not Sbruce, but IPHY is Inches Per Hundred Yards. As far as Mil dots go here is some light reading for you. Should help get a better understanding of it. Learn More About Mil-Dots in Rifle Scopes

I've had pretty good results using this method. Dan Newberry's OCW Load Development System My best advice is to develop a systematic approach to the whole process.

In this case the only thing you need is a different barrel, a barrel nut wrench and preferably a set of headspace gauges. There are a variety of manufacturers of Savage prethreads available. Brux, PacNor, Shilen, Douglas and I'm sure a few more that I missed.

Thanks for the info between all of us we'll get you straight. If you can I suggest doing the following. 1. Verify/rezero 200 yard zero. 2. Move a target to 300-400 yds (verified yds) and shoot it using the same aim point ( no holdover) your rounds should be 8" +- at 300 or 24"+- at 400 below...

OK we are part of the way to an answer. now a few more questions. 1. Did you chronograph the load? 2. If you did chronograph the load what temperature were you shooting in? 3. did you verify the 200 yd zero before shooting the 600 yard target? 4. What was the altitude/barometric pressure at...

Try googling Pejsa ballistics. I would put 1200-1300 for break velocity and .5 initially for retardation coefficient.