Hi Steve,
As you're up for this soon, there may be a little useful info. And also, more queries and questions.... :)
Got away from work early today, and loaded my first .303 rounds (ready for testing tomorrow..weather permitting).
Over the last week I've being weighing and sorting a bag of 500 bullets (about halfway through) - I've ended up with 5 categories: About a quarter of them are within 0.1gr of 174gr (which I'll keep for best), then 2 categories within + / - 0.6/0.7 gr. And 2 others more than 0.7 out each way. Some were way out (worst so far at 172.2gr) and have been use for making dummies/setting up the dies.
Prepared the cases - thanks for the tip about putting a PB brush in a drill...just the job
Priming - no problem...lee tool excellent.
Powder - Poor preparation

...I was given an old Redding powder thrower (which I'm cleaning up) but hadn't got round to mounting it on anything yet. As I was only doing 15 rounds, I decided to put the powder in the pan manually - this is time consuming and tricky. I also hadn't got a funnel to put the powder in the cases..again, tricky :roll: Fortunatly the one thing I did have was a powder trickler (would definatly recomend one of these). So if like me you've only used an 'autodisk' before, i would give some thought to how you get the powder from the tub to the case in the most effective way....

Seating - It was the first time I'd used the old 'rock chucha' press I've been given, and it was very different to using my Lee turret press. I don't know if the 'neck tension' is too loose, but it took no effort at all to seat the bullets - once passed a certain point the weight of the handle was almost enough on it's own. I am copying the PPU ammo I've been using which has a COL of (as I measured it) of 3.048 - after adustment I ended up with an average of 3.045, and found that the slightest difference in pressure (which was next to nothing) at the bottom of the stroke could seat the bullet deeper by up to 20/1000. I ended up with a difference in COLs between 3.048 and 3.040... is this ok/normal :?: :?
The final recipe was: PPU cases, CCI LR primers, 39.0gr (starting causiously), and 173.3 - 173.9 FMJ BT bullets (NO crimp

) - I'll let you know how they shoot :)