Recent content by Doom2

I missed the "L"! Not listed here https://cartridgecollectors.org/headstamp-codes/

Looking at the muzzle I doubt that there is anything magic about the angle. From an engineering viewpoint the most import job for the muzzle crown is to be as perpendicular to the bore centerline as possible so that the gasses do not impart a yawing moment to the bullet. Beyond that the recess...

Lapuan Patruunatehdas, Lapua, Finland. "VPT" headstamp with the "V" removed

FWIW, as to the original question, for a 308 169 SMK traveling at 2700 fps to have positive compensation for -20fps at 600 yds it would take a barrel deflection of~+0.00036" (assuming a 26" Barrel) to have the same impact point. This is based on a point of impact variance for the 20 fps of 0.3...

It obviously depends on the intended use and needed terminal ballistics but a 77 SMK will stay supersonic to about 800yds when launched at 2700 fps which is about the maximum for that barrel length. The bullet hits the transonic range about at about 675 yds and 1800 fps about 420yds...

CWD is not caused by a virus.

You may want to read this. https://www.700rifle.com/threads/bdl-stock-restoration-questions.20061/#post-72077

This puts reloading in a whole new perspective.

Prior to radar optical ranging was used that was located high on the ships mast to see as far as possible. If you look back at the battleships they had seaplanes that were used as observation/spotters when firing over the horizon. They would walk shoots unto the target.

The mechanical fire control computers are an amazing instrument and those used on the surface ships were not the only ones of importance. Submarines also used a fire control computer. It's seldom shown in movies. https://en.wikipedia.org/wiki/Torpedo_Data_Computer

Blazer 40gr brass case.

IN addition to measuring correctly, do not install it with blue loctite on the barrel! It is not necessary even though some on the internet may say so! Don't ask me how I know.

A slower powder reduces the peak pressure at the expense of burning the power longer and further down the barrel (area under the curve). This is why pressure signs tend to be reduced. However, since they burn slower there is a higher likelihood that they will not burn out completely before the...

Thumbs up on the Witt Machine clamp on. But I would not recommend it on a XP. The increased noise level at the shooter is going to be immense. If you are shooting off a bench you won't make any friends. The brake has a 90 degree blast.

Since your interest is in terminal ballistics from different calibers your choice of muzzle velocity is the wrong variable of interest. Terminal velocities will vary at any fix range. So what is your interest. Terminal ballistics at a specific terminal velocity or terminal performance at a...