338 spectre trim length full size#
They used the 338BR in silhouette competition back in the 60s before jd was playing with whispers.and this one is really a full size BR case with the neck set to the cal you want. JD jones seems to get upset when folks use his trademarked whisper name and its not worth fooling with him. We have been calling this one the 338BR to avoid confusion with the 223 based cartridge and also because it was the first one to have been used. You can do it in one but the neck thickness isn't as consistent. The source of this information is the SAAMI Manuel. COAL stands for Cartridge Overall Length, and is the measurement from case head to bullet tip. The trim to length is equivalent to the minimum case length. The lapua stuff is much better and we normally use two buttons to bring the neck diameter up from 6mm. Cartridges with +P Pressures, list both the standard and +P Pressure. I've had the sides split the first shot and consistency case to case is crap. I started out using Remington 7BR brass which is available every once in a while but it is crap brass.
The reamer I'm using doesn't seem to care, neck area is large enough to accept the ridge. I haven't seen any accuracy differences but some chambers don't like the ridge left when you pull the shoulder up into the neck on the 6mmBR cases. I've done a few AR 10 types and they work well but aren't as accurate as the bolt guns. 473" bolt face and typical short actions work fine. All of them have been very accurate, easy to load for and the quietest subsonics I've yet heard suppressed. A friend using my reamer had done a number of Remington 700's and they are great shooters. How do I resize the brass More important than trim length is shoulder set back as this cartridge head spaces on the shoulder. 338 caliber bullets are available in weights between 200gr-250gr. What is the trim length for the brass The official length is 1.250 but you can leave it untrimmed at 1.255. A shoulder is formed, and the case is lightly trimmed to length, and the neck is sized to. 8 in twist is standard though some prefer a bit faster if they run copper solids or the lehigh brass solids. .338 Spectre - Uses 10mm Magnum pistol cases with a 6.8 SPC bolt-face. We are shooting everything from 300gr Sierra matchkings at 1050fps to 180 Barnes or Hornady at 2300fps or more depending on barrel length.
The reamer is available from PTG I think.have to look at mine. There is another 338 whisper based on the necked up 223 case that is a waste of time. We use 6mmBR cases made by Lapua necked up to 338. Its based on the 30 Benchrest which is a shortened 308 case. I've done quite a few barrels for the Desert tacticals in 338BR which some call the 338 whisper.
0 kommentar(er)
