Posted this in "reloading" as well, but I was told I should ask a Bobby Tomek overhere. So here goes:

I have been adviced to use H335 when reloading for a T/CA Contender G2 in 7mmTCU, because it would give superior accuracy. I have the 2000-edition of the Contender Reloading Manual, and on page 147 it lists data for the 150gr Sierra HPBT. I chose a mild load of 26.1 grains, which promised to yield about 1700fps (maximium load was stated to be 27.2 grains).
After loading 5 cartridges I recalled that powder tables change a bit in time, so I decided to check the Hodgdon website for the most recent data on 7mmTCU/H335. I was puzzled that I couldn't find any data for bullets heavier than 139 grains.
Furthermore, I noticed that the listed maximum load for that 139 grain bullet was 26 grains of H335...and I am using a heavier bullet. After quick search on the internet I found a post on a messageboard, in which somebody said when getting 2000+ fps, some guy was using more than 23 grains...which suggests that that would be the maximum load.

I have two questions:
1. Does any of you have load data for bullets heavier than 139 grains? I would be particularly interested in data for the Sierra 150gr HPBT and the 160gr SPBT.
2. Is the Thompson/Center reloading manual dangerously wrong, and should I pull the bullets of the 5 cartridges I reloaded?

It's been a little over 3 years since I shot any heavy bullets in a 7 TCU, and my data is rather limited as I generally shoot hunting-weight projectiles. But here's what I had used anyway:

27 grains H335/Sierra 160 SPBT/Rem 7 1/2s in fireformed Federal brass; MV was 1789 fps from the 10" barrel.

The EXACT SAME data with the 150 grain Ballistic Tip yielded 1910 fps from the 10" barrel. (I'd estimate the Sierra 150 you inquired about would run perhaps 75 -80 fps slower given the same components)

For some reason, I don't have the seating depths available in my log, but if I remember tomorrow, I'll pull the old load boxes and get the info from there.

Neither load was what I'd consider max, but both were still upper-end.

Lastly, I do want to point out that every barrel is a rule unto itself, and custom barrels will often reach the same speeds with less propellant. As to pulling the bullets, that's totally up to you to decide. I'd weigh the history of other loads you've used in it and just let my instinct take over.