Moderator: MudBug
Hoot wrote:I live where the temperature swings over a 120 degrees and I use almost entirely Lil Gun in my 450b. I've never seen Lil Gun get faster as the temp goes down, nor have I seen increased pressure indications so I can't confirm that one.
Hoot
45r wrote:I read something on another site that lil gun has around 4 or 5 thou higher pressure in cold weather due to it's higher nitro content or something like that.Is that why the pressure is often lower for top loads on data sheets compared to H-110/296.
Hoot wrote:The one remote possibility that comes to mind is the fact that Brass, due to its copper content, exhibits a large change in volume as a function of temperature, as most metals go. A case loaded in a room at 75 degrees would have less internal volume once it got very cold. Less case capacity equals greater chamber pressure for the same amount of powder. That phenomenon would apply to all powders though. Not just Lil Gun. I'm speaking obviously in generalities and since I've never actually measured case capacity say just above the freezing point of water and say just below the boiling point, it's probably an inconsequential amount. However, maybe it's not.
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