Powder Selection for 300WM with a 22" Barrel

[ndbwhunter]

Recently swapped barrels and added a suppressor to my Tikka 300wm. I replaced the factory 24" barrel with a 22" 1:10" twist tikka take-off that came pre-threaded. I ran a few of my usual loads through it this weekend and immediately noticed some signs of pressure, which is odd considering I didn't have any pressure with the old barrel. I also noticed a fair amount of powder burning off in the suppressor after a few shots. This tells me that I'm not getting full combustion and will either need to switch to a faster burning powder or possibly a heavier bullet.

What are my options here? I'm not interested in testing the pressure limits. I just want something that is accurate and reliable. This is a hunting rifle and won't be used for distances greater than 600 yards. I've been shooting 180ttsx. Should I switch to a heavier bullet and stick with the RL26 or H1000, or keep the 180ttsx and starting playing with a faster burning powder. I do have some flexibility with COAL since I'm running mountain tactical bottom metal and AICS mags.

Anyone with access to quickload that could run some numbers?

 

[archp625]

H1000 is the staple when it comes to 300 WM/WSM. It won't be a screamer but solid and temp stable.

 

[ndbwhunter]

H1000 is the staple when it comes to 300 WM/WSM. It won't be a screamer but solid and temp stable.

It is a great powder, but it's on the slower side in terms of burn rate and is even a little slower than RL26. I need something that will allow for full combustion in a 22" barrel.

 

[archp625]

Oh I agree. Maybe H4350 or 4831 of some variety.