When should I trim my case length?
When should I trim my case length?
There is no set rule as to how often cases should be trimmed to length. Some calibres will need trimming more frequently than others. If you are using a ‘pokey’ load, and by that I mean a load that is near the top end of the pressure range, brass tends to flow more and so the cases will need trimming sooner.
How important 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. Cartridge overall length, or “COL”, is important to safe functioning of reloads in firearms.
What is the case length of a 223?
1.76 in
| .223 Remington | |
|---|---|
| Rim thickness | 0.045 in (1.1 mm) |
| Case length | 1.76 in (45 mm) |
| Overall length | 2.26 in (57 mm) |
| Case capacity | 28.8 grain H2O (1.87 ml) |
Do you trim brass every time?
NorCalMikie said: Best thing it to know the “actual measured” length of your chamber. Once you know that, you trim as needed or whenever you think is best. Pick up some case plugs from Sinclair and measure your chamber length.
What is the case length of a 30 06?
2.494 in
| .30-06 Springfield | |
|---|---|
| Rim diameter | .473 in (12.0 mm) |
| Rim thickness | .049 in (1.2 mm) |
| Case length | 2.494 in (63.3 mm) |
| Overall length | 3.34 in (85 mm) |
Does OAL affect pressure?
The primary effect of loading a cartridge long is that it leaves more internal volume inside the cartridge. This extra internal volume has a well known effect; for a given powder charge, there will be less pressure and less velocity produced because of the extra empty space.
Does headspace affect accuracy?
Not only is headspace essential to rifle accuracy, but it is a major safety factor to consider when assembling a firearm. Improper headspace can cause case head separation, unsafe chamber pressure levels, or failure to function.
What grain 223 is best?
The best all-around grain for . 223 is 55 grains. It is the ideal weight for the cartridge when used to fire an AR-15 and delivers good accuracy and velocity without excessive recoil. However, 40 grains can work well for varmints and 77 grains is better in windy conditions.
How fast does a 223 bullet travel?
3,200 feet per second
223 exits the barrel of a gun, it flies at more than 3,200 feet per second, and is still going 1,660 feet per second after traveling 500 yards. The . 22, meanwhile, leaves the muzzle at 2,690 feet per second, and slows to 840 feet per second at 500 yards.
Can you trim brass before sizing?
When do you anneal your brass during your process? Trimming before sizing won’t help you much. Sizing reduces case diameter, cases tend to grow in length during sizing. I don’t shoot BR preferring NRA-style long range stuff so my typical practice is to trim new, sized (308 Palma) brass to 2.005″.