Blue, I have had only limited experience with the BPCS shooting game, but I did like the results I got when I took the old standard 405 gr flat nose Ideal bullet #457193 and crammed it into a case full of ctg black along with a felt wad (Ox-Yoke Wonder wad, I believe.)  For chickens at 200 and the pigs as well, it never failed to satisfy if I did my part on the stock, sights and trigger.  YMMV, but it may be worth a try for you.

Froggie

PS  FWIW, I was using a (.45-70 rebarreled) original high-wall for shooting these rounds.  GF

Beats the heck out of me!    I just threw them together on a whim when I got ready to shoot a BPCS match on a weekend when there was no schuetzen match available.  That was a mould I had used for some smokeless loads and I got as good accuracy as I could hold (minute of backstop or better. )  It really seemed at 200 that they were staying on the chickens when I did my part.  In fact, I was even able to bag a couple of turkeys and rams with them...if the animal was hit at all, it went down.

Velocity?  Isn't that some weird kind of bicycle? 

In reponse to your BTW, I was 35 before I knew that high-wall and single shot rifle were not the only way to write a sentence about fine shooting...and when all else fails, I still go back to that. It's still my default setting. 

Froggie

Paul Jones has a 410gr., bullet #45011, chicken killer.  I know how much your rifle likes his 45001 creedmoor.

boats,

  Very interesting! I'm gonna be shooting my very first Shilouette match next Summer and have been wondering about this very thing.

  Do you have any idea what would be a good "light" bullet to use in the .40/65? I have a Browning BPCR. The "big" one I'm working with right now is the RCBS 40-400-CS which weighs in at 417 grs. in 1-25. Two accuracy loads I have so far have a MV of 1225 & 1245 fps. Neither is to bad on recoil but would be nice to use something a bit lighter for the chickens, at least, and possibly everything else besides the Rams.

  Which brings up another question. What would be a good MV to use that would be good for the Rams. From what I read in Garbe & Venterino's manual it seems to be a LOT different than what I read on MSN's BPCR.

  Some of the guys around here that shoot Shilouette say you have to use 59 or 60 grs. of 1 1/2 Swiss in that caliber. This seems to be bourne out by those using less not doing to well on the Rams. Could be their shooting ability to so it gets a little confusing.

PETE

Blue

On the 405's I never shot Silouette with my Trapdoors, Just over the course paper targets.  The Goverment Carbine and Cadet rifle load did not have any fillers. 59 grs of 2 F Black compressed . Wolf Says it gives 1220-1240 fps. It's a bit shorter overall than the 500 gr rifle load.  It's no creampuff and is very suitable out to 400 yards or longer for paper targets. For Rams I doubt if it hits as hard as a 38 cal lighter bullet due to the BC of the bullet.  I would buy Wolfs book for sure if you want to work with 45/70's. He has lots of intresting loads.

Pete, I never worked with a 40 cal but it is no doubt the cartridge of choice for BPCS.

The BPCS I shot was with a CPA in 38/55  My theory was it's more important to hit the Rams than it is to make sure all stuck fall over. At the AA or even AAA level that is. Top level shooters can't afford to let any go and need the larger cartridges for insurance.  Missed critters cost the same as hit not toppled and mid level shooters like me miss plenty. 

I gave the Black powder game up for Schuetzen and now only shoot Silouette with modern rifles.  I like offhand and the BPCS game is realy a prone match.  At mid skill level most shooters give up the chickens completly.  If you can hit the Chickens you will have a very strong advantage over most people. The pigs are easy and the Turkeys and Rams are a team shooter/spotter leg. If you can hold hard and adjust your sights as told the spotter will put you on them.

That's all I know about it.

Boats

Pete

I have sighted in on match day and as match official at our club have watched plenty of people do it. It's pretty rushed and you are not likely to get good sights. It only works when you have an experenced spotter/shooter combanation working together.  I have had a lot to say about the shooter spotter combination, Years ago I put an article in one of the mags about it that caused some comment. Not all complemtery.

To tell you the truith it's why I gave the sport up for Schuetzen. My schuedle and match locations does not allow a fixed partner and pick up spotters are way less than worthless "WOW you missed that one"   Schuetzen is individual 100 %

High power I have a couple of guys I work with and Small bore it's not as important.  But I will tell you this. Small bore the only target I have not picked up a 10 in a row pin is Rams. And I am convinced a good spotter would have put me on them at times.

for sights what I have for both HighPower/BPCS and Smallbore silouettes is a set of stencils for all the Critters actual size.  I's not hard to set some up. Just lay the actual target on a piece of cardboard and spray paint the outside edge.  Then at home jigsaw tha pattern onto some hardboard or plywood.

Then I spray paint the actual sized target on old cardboard boxes.  A big TV or appliance box for the rams and smaller boxes for the rest.   Put some dirt in the bottom and set them up at match distance You have a life like target with a muted background just like at the actual match. And more important it shows holes so you can play with the sight settings etc.   

BPCS is a great sport it just did not suit my situation.

Boats

Pete;
I have been on the road thru most of this discussion so I really could not reply in a timely manner.

Your choice of a 300 gr RCBS should work well for you. When I bought my first BPCR, a '75 C.Sharps in 40/65 I really wanted to "smell some smoke". The only mould available from my local supplier was the RCBS. I bought it and my first group out of the rifle at 100 yards was just under an inch! I upset a couple of "old timers" who were watching. Apparently, they had NEVER had such a tight group with BP. Here I come and the first thing out of the box was a "winner". I can't take a great deal of credit, I had purchased Mike Venturino and Steve Garbe's book, "The BPCR Primer" and just did what they suggested. Couldn't miss!

At any rate, I shot this "little" bullet until I got my heavier bullet mould. Frankly, for the chickens and pigs you could not ask for better results. They also did reasonably well on the turkeys but somewhere between the turkeys and the rams they "went astray". If I were required to use them for both the chickens and the pigs I doubt that I would suffer much. If your rifle likes the 300's as much as mine did, you should do fine on the chickens. The recoil is noticeably less, by the way.

Good luck!
Dale53