Author Topic: .40-82 Silhouette.....  (Read 1076 times)

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Offline cam0063

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.40-82 Silhouette.....
« on: April 12, 2003, 07:12:56 am »
Hi all,

I am researching information for a second BPCR project...

Is anyone out there shooting the .40-82 Silhouette? It sounds a very interesting cartridge... Dave Crossno has been very helpful and sent me info on his cartridge, am awaiting info on the Lone Star. What is the difference between the Crossno and Lone Star versions? Are there other vraiations of the .40-82? I have been told the original .40-82Win fouled quite badly after a few shots [due to its bottleneck design maybe?]. Were the new improved .40-82s designed with a straight tapered case to assist reducing this previous problem? Was it ever a major problem?

Appreciate any thoughts/comments.

cheers,

Cam...
way Down Under
Western Australia.


Offline Brazos Jack

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.40-82 Silhouette.....
« Reply #1 on: April 16, 2003, 08:28:34 am »
Cam,

I don't have a 40-82, but I too am considering it as a "do everything" caliber for Silhouette and long range. The following is from a post I copied to my hard drive from another forum:

There are two basic variations of essentially the same cartridge / case. Both are .45-2.4" cases tapered down to .40 caliber. Dave Crossno of Dibble, Oklahoma has a chamber (his design I think) that starts tapering in a straight taper from the case head to a short neck (about .4") and must be case formed with his proprietary FL die. Dave Higginbotham of Lone Star Rifles in Conroe, Texas also offers a slighltly different version. The Lone Star .40-82 is essentially a .40-65 profile with a .3" straight case head just above the rim. It is formed using standard .40-65 FL dies (I use the Redding-Saeco) stopping about .3" above the case holder. When I form brass, I first anneal Starline .45-90 cases and then size until they will just fit the chamber, by trial and error. I can't say just how far I stop above the shell holder but it is about .3".

The Lone Star version, by virture of having the straight portion at the case head instead of tapering up from the rim, should hold slightly more powder.

Hold Center,

Tim Allen
Houston, TX
Brazos Jack
SASS #44528

"Those who beat their swords into plowshares usually end up plowing for those who didn't"  Ben Franklin

Offline cam0063

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.40-82 Silhouette.....
« Reply #2 on: April 30, 2003, 04:20:41 pm »
Hi Tim,

Thanks for the input... I am keen on the .40-82Silhouette cartridge and have ordered a barrel for this project... I am still a little undescided on the Crossno or LoneStar versions. Dave Crossno has been very helpful and sent me information on his cartridge. Havenot heard back from Lonestar... I will wait and gather a bit more info on which projectiles are showing promise before I order a couple of moulds. Moulds must be imported from the U.S, are very expensive once landed here. If unhappy with your choice is is very hard to sell them on as so few people shoot BPC, so your choice you must be happy with ;).... I do like the Long Bore Riding projectiles and will be looking very closely there for a good one to use at Long Range. I have a .45 barrel on order also, but have decided to build the .40-82 1st. Then I can see which chambering in .45 will best complement the .40-82.

cheers,

Cam.....
way Down Under
Western Australia.

Offline Coydog C.

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.40-82 Silhouette.....
« Reply #3 on: May 28, 2003, 10:43:36 am »
Cam,

    The other important thing to look at is the reamer itself. How much freebore is incorporated into the design. In the case of my .40-2.4” (still sitting in Cody, WY), there is very, very little freebore. This requires bullets like the PJ Creedmoor to be fully seated, which is exactly what I’m after. The powder capacity will be reduced somewhat to a 40-65+, but all my grease grooves will be covered. I plan on using mine strictly for Silhouette. I don’t believe the 40-82 to be a “do everything” cartridge, because I don’t believe that a “do everything cartridge” exists.  :grin: If it did exist, I still think the cartridge that comes close is the 45-2.4”.  8)

    For now at least it looks as if Long Range is still dominated by big .45s, and silhouette is a toss-up between .45s and .40s.

   Chuck
"Your Mileage May Vary"