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Thanks to all of you for your insights and advice. I've gone ahead and ordered the reamer from Dave Manson.

Here's what I meant: If you have an unfired case you plan to use that is, for example, .430" in diameter at the shoulder, how much greater than that should the chamber dimension be at that point to be sure of smooth chambering and sufficient room to expand? Similarly, if the diameter of the...

Thanks, CCrider. That's good information. The .265 you mention must be without any turning. Would you happen to know the diameter at the base (or .200" above the base) and at the shoulder? I'm wondering how much more the chamber at those dimensions should be than the brass to ensure smooth...

Many thanks to all of you who have contributed here. Below is my final attempt at designing a 6 PPC chamber reamer for my upcoming project. I've incorporated most of the suggestions offered. The one final question I have is whether I can be completely sure that the newer Norma 6 PPC-USA brass...

I've made some progress in specifying the chamber reamer I'd like to get. I wanted a .265" neck diameter, .030" freebore length (to be able to shoot light BT bullets), and 1.510" overall length. I obtained a standard chamber diagram from one of the reamer makers--this one for a no-turn...

So, no one using a forend bedding device--like the one you used to see in Rem. 40X rimfires? You could vary the tension via a screw in the forend. The theory was that some contact at the forend tip helped to damp the barrel vibrations.

I'm not completely certain about that as there is nothing on the rifle indicating the importer. However, Stoeger Canada has been the Canadian distributor of Sako rifles for decades, so it probably was imported by Stoeger. Just out of curiosity, why did you replace the Sako target trigger with...

Chino69, yes it has the holes in the trigger guard and the Sako target trigger. In connection with the latter, does yours have that trigger? If so, how low have you been able to get the weight of pull? I followed the instruction page for the target trigger that came with the rifle and have...

I'm a total amateur in this domain of benchrest shooting, but I've had the same concern in connection with a Sako A1-action 6 PPC varmint rifle. On the carton, the word "Bench" has been written in, and so I'm assuming that this was the use envisioned for the rifle. The barrel is heavy...

I hope this isn't too basic a question, but I'm wondering whether everyone uses fully-floated barrels in benchrest or whether some use some up pressure on the barrel--maybe at the forend tip.

Jackie: I would like more bullet contact in the neck than I'm getting with my Sako sporter in 6 PPC. I get only about .125" of case-neck contact with the 68-gr. Bart's FB (touching the lands, where it shoots best) in that rifle. I don't know what the freebore was on the reamer that cut that...

Just to be a little more precise in what I'm asking, I would like to have the Bart's 68-gr. FB bullet contacting the lands when the base of the bullet is even with the neck/shoulder juncture of the case. This means that the overall length of the loaded round with the Bart's 68 FB will be about...

Custom. Nesika action.

Can you guys give me some advice on ordering a chambering reamer? I want to have a varmint rifle built in 6 PPC. I don't want to go with the 6 PPC-USA chamber because of its large neck diameter (.272", I believe) and long leade/throat. I have that chamber in a factory Sako Vixen sporter in 6...

I'm going to have a 6 PPC built and am supplying the chambering reamer. Can I obtain superior resizing (neck-only with bushing) and seating dies by using the chambering reamer to make them with something like an L.E. Wilson (or similar) die body blank?

I'm really late to this discussion and am anything but expert in this area, but am considering having a 6 PPC varmint rifle built. I plan to use Norma 6 PPC brass. I've mic'd a couple of Norma 6 PPC cases with a Starrett neck micrometer, and the brass thickness appears to be about .011"...

Please excuse me if this has been discussed. I did try to do a search, but couldn't find anything. My question is this: Is there a consensus among you rimfire BR shooters regarding the advantages of sorting cartridges with respect to weight? On the face of it, I don't see why there should be...

Steve, that's terrific information. Thanks for providing it. If the firing-pin travel time is 1.7, wouldn't that be the same as how we normally define lock time? I'm guessing that the 2.1 ms. includes what we might call "trigger time," or the time from trigger release to sear release, which...

Right. I read that the Rem. 540 has a lock time of 1.4 ms., which is very fast. According to another source, the British Paramount action has a lock time of 1.3 ms., which has been described as the fastest of any production action. And, Tim, as you say, the Anschutz M54 action has a very fast...

Is there a chart somewhere giving the lock times of various rimfire actions? I tried a search on this site using 'lock time' as the key words and got nowhere. Any help would be much appreciated.