Guys, I'm thinking of making a new drop tube for BPCR. Before I do, I'd be curious as to what some of you use. Any photos or plans?

I has the machinist at work turn me a duplicate adapter for the Lyman #55 that I drilled out and fit with a piece of 1/4 brake line to get a compressed load of powder into .222 brass. I suppose a larger diameter like 3/8 would work for BPCR.

RJ

I fabricated a drop tube using some light steel and a long piece of steel fuel line. The base is about 4" by 5" and a hole is drilled large enough to hold any standard shellholder that just sits there under the tube. From the base plate is a long 1/4" round rod that goes up and has two protroding metal tabs that each have holes in it to allow the tube to run through over the shell holder. The tube is adjustable for height by using rubber o-rings that are tight on the tube. You can just raise or lower the position of the o-ring on the tube and when you let go the tube will drop down until the o-ring contacts the top metal protrusion. Now when you install a case into the shell holder just grab the tube and lift it, insert the case and lower the tube into the mouth of the case. It can be adjusted to be just inside the mouth of the case and works well will smokeless compressed loads too! If you try another caliber then just move the o-ring. Flare the top of the fuel line with a flaring tool and it will be the right size for a powder funnel.

25" of an Al. arrow shaft. Can usually get one donated by an archer once it's been bent or dented.

Me too, el-cheapo, steel brake line, copper tubing, arrow shafts .... whatever works for what you need and you got laying around. If you don't have anything handy, brake line will likely be the cheapest and it comes in a variety of sizes.

I made mine using a long piece of brass tube (thinwall) that I got from a hobby shop that specialized in model aircraft. I drilled a hole in two pieces of oak to fit the tube, and then mounted the two pieces on a backing board as long as the tube, and attached to a base.
In use, the RCBS powder funnel is a snug fit on top and the case is held up to the tube at the bottom while I pour the powder into the funnel.

Guys, I'm thinking of making a new drop tube for BPCR. Before I do, I'd be curious as to what some of you use. Any photos or plans?
I made one out of brake line. At the auto parts stores the brake line comes in various sizes & lengths. I picked the one that fit in my 45/70 case, the OD was 3/8 " & a couple feet long. It comes with the screw fittings on it & swaged ends. I cut one swaged end off & dropped off the fittings & had a small aluminum funnel & shoved the brake tube though the nozzle end. The aluminum funnel is soft enough to form to the brake tube. I then took J-B weld, a 2 part epoxy that sets up like metal & seated the swaged end of the brake line in bottom of the funnel coated with J-B & smoothed the inside to a nice finish. It works well because the tube is plated & has a good smoothe finish, however I noticed that there was some powder that jumped out of the case & got on the loading block. Of course that changed my carefully weighed charge, so I got an "O"- ring that fits tightly around the tube & move it down to the top of the case & this makes a seal to keep my powder in the case.
You can get the stuff at a good hardware store & brake line & funnels are cheap, the J-B Weld is the most expensive, but then you have enough to make a lot of tubes.