• You are using the old High Contrast theme. We have installed a new dark theme for you, called UI.X. This will work better with the new upgrade of our software. You can select it at the bottom of any page.

concerned: data for H335 in 7mmTCU?

Status
Not open for further replies.

max28461

Member
Joined
Nov 13, 2006
Messages
1
Sorry, I know it's not the best thing to be new on a forum and ask a Q as my very first post....but I'm kinda desperate.

Hi y'all,

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 a 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 H335 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?
 
I have a 1982 edition of the IHMSA Reloading Guide for Handgun Accuracy. It shows a max load for the 139 gr bullet at 22.5 grains of H335. For the heavier bullets all that are listed are 4198 or 748.
 
Status
Not open for further replies.
Back
Top