Why is my pump over-pressuring?

[Gwion]

Usually has something to do with a seal. Try shaving your pubes and see if that helps

Bwa hahahaha...
You shocka!

[bigpete]

Lol

[Daddybang]

Usually has something to do with a seal. Try shaving your pubes and see if that helps

Nice to know I wasn't the only one thinking along those lines!

[Medic]

So I did some more testing and some chronographing.

I’ve stepped away from the AP100 in favour of the 2205.
The average speed I’m getting out of a T3X with18.5 grains 2205 is about 3150 FPS with a 55 gr pill. You can go more but your gains drop off. No pressure signs at all.
With 20g 2205 and a 40 gr pill 3550. (ADI load data is pretty right) could push to 21.5 but no point.

Plenty good enough. The pump cycles fine with 2205 too.
I feel safe with to ap100 14 gr for a plinking load in bolt actions only 2900-2950 with 55gr pill. Will step that down to 13.5 for safety reasons for a nice dual purpose fun load. No good for pumpys though
Just thought I’d update. Good fun.