Ult

[kcombs9]

minimum oz of force needed to trigger the ULT.

couldn't find anything in my search(s)...

[xero28]

I want to say 15 ounces? Or is that the standard RT on/off?

[athomas]

15oz is correct. It will vary slightly depending on your setup. A higher chamber pressure increases the force required, so using a barrel that is not efficient will increase the force required due to the higher pressure requirement to operate at the proper fps.

[kcombs9]

15oz is correct. It will vary slightly depending on your setup. A higher chamber pressure increases the force required, so using a barrel that is not efficient will increase the force required due to the higher pressure requirement to operate at the proper fps.

I use a light lvl x spring and a dw fibur barrel and under bore when I can so it should be fairly efficient, so I might have a bit lighter pull. Is there an easy way to test what my current setup is needing in force? And dose adding shims change it any?

Thanks for the input so far

[athomas]

Use any scale that can be used for testing tension, although not everyone has one of those. You can use a spring scale if it is for measuring very light items. Make sure the point of contact is at the spot on the trigger on the same plane as the trigger rod.

Shims don't affect the force.