Progress???

It's unlikely that you will hit PRs all the time, and you don't necessarily have to.  Many throwers use what's known as range throwing in their daily sessions.  Generally you throw at about 80% intensity for 90%-95% of your throws, adding in 1 or 2 max throws per session.

As you pointed out, the throws can be executed with a relaxed solid form.  Over time, this translates into big throws as max levels.

I try not to worry about PR's all the time but averages with my group of throws.I try to get good averages when i practice that way i don't stress out about getting PR's all the time.

Back when I was throwing...

I practice one or two events a session and work towards a high number of complete, technically sound throws.  What I have discovered in a relatively short amount of time, as most folks on this board already have:  More often than not, the most consistent athlete carries the day.  To that end, I set a tire, flag, cup, whatever, at a given distance...occasionally I paint a circle in the grass, and practice just dropping the implement into that tire or into that circle.  Over and over again.  Nice and smooth, plenty of rest between throws. 

For example, I know I can go 100 in the LH just about any day of the week.  No big deal.  So, I will set a circle at 100, then another 100 from that, and another 100 from that.  My training partners and I have 4 or 5 LH's between us, so I will scoop 'em all up, throw 5, then walk down and get them, stand in the first circle or close to it and throw them into the next one.  I get high volume and a great opportunity to polish the finer aspects of the throw...hips, heel-toe, low points, etc.  How perfect can my form be?  How easy can I make the rep?  The idea is not to drop serious bombs in practice, but to get the rust off and get a good feel for the event.

This is where the consistent athlete part comes into play...once I am good for 100 in the LH every time without too much hassle, I will move the circle to 105.  Or 110.  Whatever.  PR's are great, but consistency counts.  Maybe I'll go to a Game, have a bowl of TRob's RageBerry Crunch (Or my favorite, Count Crunkula!) and do something obscene with the hammers or weights.  Maybe not.  Maybe my practice PR's are about where the record stops...but again, I know this going in.  I expect nothing less than those numbers, and when I go a little longer, well, that is just cool too.  Never count on PR's at a Game.  Adrenaline doesn't count for much...neither do bagpipes.  Play like you practice.

"But if you were me then I'd be you, and I'd use your body to get to the top!  You can't stop me no matter who you are!"