What length barrel when using suppressor?

I hunt box blinds and have a 5.5"
Banish Back Country on order. I have a 24" Bergara HMR 6.5 PRC I don't want to hack any of the barrel but I would like to hunt suppressed.

Honestly when I get the can, I may run down to the lease and get in my box and see what if it will be a good fit.
 
I'm experimenting with a 23" 6.5-284 and a ul7. I hunt open country but not sure yet if it'll work for me. I sure do like the short barrels and giving up a little velocity has caused me no issues. If in doubt go 24" and cut it later.
I ran a 26 inch barrel on my 6.5 x 284 norma ,this time I went with a 22 inch and a suppressor.. the balance is perfect!
0A65D636-B421-46BA-9914-6252866E3ED3.jpeg
 
I ran a 26 inch barrel on my 6.5 x 284 norma ,this time I went with a 22 inch and a suppressor.. the balance is perfect!View attachment 433969
Got break in done tried working with my old load for the 26 inch barrel didn't quite cut It. I had to jump to a faster powder for the new 22 inch barrel. Looks pretty good I'm sure someone with better eyes could do a little better.
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