What bolts do you use?

For target work with medieval style crossbows, what bolts do you use and/or recommend?

Of course length, thickness, total weight, etc., vary from bow to bow, but I have settled in the last few years on using blunt metal tips for target work. Since they don't penetrate as much as points, they're easier to get out and I strip a lot less fletches.
Gnome

Here are a few points of my heavier bolts, all of these have seen use.
All of them work and are easy to make

From top to bottom
- 125mm M10 bolt fixed with heat shrink tube
- 8" nail
- 5" nail
- M12 nut
- a "period" point from 10mm tube cut in an angle and flattened, These pull out well from bag targets, but might be problem with foam.
- 7.5mm aluminum shaft with 5" nail pushed in to make a blunt point. Aluminum bends easily in use.
- 8mm solid fiberglass snow plough marker shaft & regular field point. 30-40gram bolts of practical length can be done this way.
- just plain wood, As far as the shaft is heavy enough these are quite good. I do most of my long range field shots with these. Since they get easily lost , I want them to be biodegradable.

- hardwood in brass tube, This is an archery arrow. I used these when I was still shooting fiberboard and foam targets at club ranges.

Couple reinforced butts.
- coffee filter with PVA-glue
- Heat shrink tube.

Thank you for posting that, what sort of draw weight(s) were you using?

Anything from 90# to 240#
140-180# mainly, wooden or fiberglass bows.