How far from the lands should a bullet be seated?
Most bullets shoot most accurately when seated to within . 035 inch to . 015 inch of touching the lands. Many benchrest shooters like them just kissing the lands.
How long is an AR 15 overall?
The AR-556 has a barrel length of just 10.5 inches and an overall length of 25.3 to 27.9 inches.
What is the overall cartridge length for 6.5 Creedmoor?
2.825 in
| 6.5mm Creedmoor | |
|---|---|
| Case length | 1.920 in (48.8 mm) |
| Overall length | 2.825 in (71.8 mm) |
| Case capacity | 52.5 gr H2O (3.40 cm3) |
| Rifling twist | 1-8″ (203 mm) |
What does ogive mean in reloading?
Bullet Ogive – bullet ogive is defined as the “curve of a bullet’s forward section” and can be expressed as a tangent ogive or secant ogive. A bullet with a tangent ogive is one that has the cylindrical surface of the bullet tangent to the curve of the point.
Does seating a bullet deeper increase pressure?
Seating a bullet against the rifling causes pressures to be elevated noticeably higher than if the bullet were seated just a few thousandths of an inch off the rifling. Many times the best seating depth is with the bullet touching or very near the rifling.
How many inches does a 6.5 Creedmoor drop at 1 000 yards?
110 inches
Compared to the . 308 Win 178 grain BTHP with a G1 BC of . 53 and muzzle velocity of 2600 FPS (from the Hornady box) the 6.5 Creedmoor has 110 inches or 9 feet less drop at 1,000 yards.
How many inches does a 6.5 Creedmoor drop at 200 yards?
6.5 Creedmoor ~ 130 Grain ~ Trajectory Chart
| Range (Yards) | Velocity (Ft/Sec) | Bullet Path (inches) |
|---|---|---|
| 200 | 2588.3 | 0.0 |
| 300 | 2418.0 | -6.72 |
| 400 | 2250.3 | -19.4 |
| 500 | 2086.5 | -38.96 |
What is case overall length?
The overall length (OAL) of an ammunition cartridge is a measurement from the base of the brass shell casing to the tip of the bullet, seated into the brass casing. A cartridge’s overall length may be shorter than the maximum standard, equal to the standard, or sometimes even longer.
What does coal mean when reloading?
cartridge over-all length
COAL (cartridge over-all length) is the measurement of the cartridge from the tip of the bullet to the base of the cartridge. The cartridge over-all length is an important dimension to understand, especially if functioning hand loaded ammunition through a firearm magazine.
How to test accuracy of handloads for hunting rifles?
However, that wear will slow down considerably after the barrel is broken in. When testing the accuracy of handloads for hunting rifles, start experimenting with the longest OAL that will fit in your magazine. Then start making your handloads in .003″ shorter increments until you find the OAL that shoots best.
What is cartridge overall length and why is it important?
Cartridge Overall Length is the fine tuning. It can often make what appears to be a very average performing ammo combination for a given firearm, a great performing combination. Optimizing bullet seating depth is going to give you the ability to compete successfully, or make the shot of a lifetime.
What is the average length of a bullet?
Depending on many factors, individual bullets, even from the same box, can vary in length by up to ~0.020”. This reduces precision when measuring COAL from tip-to-base of the cartridge.
Why is repeatability important when it comes to handloading?
Repeatability is everything when it comes to handloading, and you may also be loading for more than one rifle with the same set of dies. So locking a standard die won’t work, leaving you to have to do the same in and out with the press and the calipers every time you reload for that rifle.