pressure

  1. Case Geometry and Pressure

    This question came to my attention a little bit ago, how does case geometry affect pressure? I have an example. Lets say we have two cases, one a shorter bottleneck and another a longer straightwall, both cartridges have the same case capacity and are the same caliber. If you put the same...

  2. 6.5 cm load too hot. what now?

    hi. i loaded what i thought was a ~min load for my 6.5 cm howa oryx. due to limited poweder options i was forced to.. research a bit to find a load that seemed to be correct for my powder. upon shooting, it seems it was not correct. Although the bang was arguably louder than usual, notbing...

  3. Load development in winter vs summer?

    Just got a new rifle (bolt- 6.5 Grendel-22” Howa barrel) Worked up to a mid weight load (25.7gr of IMI 8208 XBR) with 130gr sierra game changer OAL is at mag length (2.310”). Manual says max load is 26.4gr. I’m going up in 0.2gr increments, showing zero signs of pressure thus far. Shooting temps...

  4. Pressure Problems 6.5 PRC

    I just recently purchased a Mossberg Patriot Predator chambered in 6.5 PRC. I worked up a load for it with 54.6 Gr of H4831SC, 147 ELDM, Fed Match 210M primer and hornady brass. Shot really really well. Lights out at 1200 yards. After about 120 rounds I started to experience pressure mostly...

  5. 6.5 Creedmor ejector mark question

    Need some help to identify very faint ejector marks on new lapua brass. The components are: NEW lapua small primer brass br4 primers H4350 scenar L 136 gr tikka t3x tac a1 rifle in 6.5 creedmor COAL 2.860 Iam seeing very faint ejector marks at 42.7 gr which gives me around 2725 fps. The marks...

  6. Pressure measuring primers?

    I was thinking about the subject of "reading the tea leaves" for signs of excess pressure, when it sort of struck me: Why couldn't a primer be designed that would record peak pressure with some degree of reliability? I began thinking about it and came up with an idea, that I'd like to run by the...

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