Sorry but IMO the hack saw vs a sawsall sould not be an issue it's an excuse. Make sure you have a good / solid $20 hacksaw with a reasonable blade. Hold the pipe tight against the ladder with your knee, push down with some medium force, give a few strocks and your thru. There with practice you can cut as fast or faster with a hack saw. Also your batteries wont go dead.
Everyones got their prefernces for tools to use for a job. IMO the reamer screwdriver can't be beat. The reemer tool poster earlier I have seen only 1 or 2 people use those out of 100's I worked with. They seemed a bit bulky / heavy.
http://www.service.kleintools.com/CG...88F072+PRD+ENG
For 1 1/4 or bigger I recomend a pair of curved jaw chanel locks for the outside and a pocket reamer for the inside like this:
http://www.buyplumbing.net/?pg=pd&_i=RDEBO
Good advise about keeping only the tools on you you need to rough, screws, and a few knock out plugs.
If you don't have one get a material pouch and load it up with th couplings, straps, connectors, etc. you need for about an hour. Grab more than enough material when you start.
You have to chose. Don't supply the whole job (say you your out of ? too), hide your stash of material, or bring enough for everyone. The point is you can keep making trips for material. Try to not leave your work area until the next break.
Try to figure the quality standards for your company by the others work and match it but not over exceed it.
Talk to the foreman and set goals for work for you to finish in a given time.
Try to figure how much faster the journeymen are if they are doing similar.
Look at it from a business view. If an apprentice is making 1/2 the journeyman but takes 2 tims as long it's almost a wash. But if an apprentice takes 4 times as long then it does not make financial since.
For speed use a tape measure less and cut to fit. Also use more couplings and less bends per pipe. I know I like to make complicated bends but it not a skill test.
There is a few reasons for a foreman to say the worker is too slow:
1. The worker is not getting enough done (in their opinion) in a given time.
2. The worker is seen working not efficently. From fumbling to find their tools, not having what they need when on the ladder, waisted movements, walking to get someting, or looking at the project like a deer in headlights. Keep in mind this comes form a moment a foreman happens to walk by and not see elbows moving. Or it could be your doing something that is a pet pev. Perhaps you were reaming the pipe with needle nose and they thought that was too slow campaired to a reamer.
3. The company or foreman will always push the workers saying they are too slow to try and get more out of them.
4. Others are not pulling thier weight and you are being pushed to make up the difference.
Keep in mind this is a bad time to look for a new job. Keep a positive can do attitude and say you'll try better next time.
Good Luck