Thread: Pressure / barrel speeds?

Originally Posted by Shearer

Remember it's winter and pressures can rise as the weather gets warmer. This will vary depending on the powder.
I would stay away from any signs of maximum pressure at the moment. Maybe back off a full grain instead of half.

Mmmm ive lost 40fps since summer with my happy load, is that what would be expected?

Originally Posted by Gibo

Mmmm ive lost 40fps since summer with my happy load, is that what would be expected?

Hey Gibo,

Did you change any batches of the components or the brands themselves?
Remember the difference between hot air and cold air? Hot air is less dense so it should be faster.

This table is from Hodgdon powder but you might see that somethings back up your Velocity data https://www.hodgdon.com/smokeless/extreme/page3.php#top