New .416 Colossus Cartridge from John Pierce and Mark Fox

When Bigger IS Better — The New .416 Colossus ELR Cartridge
John Pierce, founder of Pierce Engineering revealed an impressive new cartridge developed for the ELR (Extreme Long Range) game — the .416 Colossus. This has achieved 3300 fps shooting the Badlands Precision 525gr solid copper projectile (BC: 1.20 G1, .614 G7). Above is a “big rig” designed to shoot this cartridge. This rifle boasts a custom Eliseo chassis with 20X Pierce Engineering action and Krieger barrel. John Pierce noted: “Big thanks to Gary Eliseo for building this special chassis. Pete Contacos owns and tested the rifle and cartridge. He is ecstatic to say the least.”

John Pierce reported on Facebook: “After a long two years of development and waiting to see what results could be achieved, we are very pleased. The Colossus cartridge, designed by Mark Fox and myself, is showing great [results].”

The cartridge boasts impressive velocities. John reports: “Over 3300 fps shooting the Badlands Precision 525gr .416-caliber projectiles. Zero bolt-lift issues from RCC (Robertson Cartridge Co.) brass. [We have] 25 firings on one test piece and still good to go. Big thanks to Dan Warner [at Warner Tool] for making the special, awesome dies.”

More Capacity and Higher Efficiency than .416 Barrett and .416 Warner
One Facebook commenter wanted to know how the .416 Colossus compared to other big .416-caliber cartridges created for the ELR game: “Can you or Mark share the increase in powder capacity over a standard .416 Barrett and over a .416 Warner?” John replied: “I would rather not elaborate on details of cartridge just yet…however it has a bit more capacity and higher efficiency using a large magnum primer.”

Pete Contacos, the rifle’s owner, posted: “I would like to thank everyone who made this possible: John Pierce, Mark Fox, Gary Eliseo, Jeff at RRC Brass, Jason At Badlands Bullets, Dan Warner for dies. This is an AMAZING rifle made possible by all of the above People. THANK YOU ALL… looking forward to seeing you all at the matches this year.”

Gary Eliseo (Competition Machine) is making a similar big chassis for John Pierce. Gary posted: “Yours is almost finished”, to which John replied: “Thank you for the beautiful chassis, exciting to get my Big Red.” Gary has told us that this big new chassis is a scaled-up version of the Competition Machine UMR system. The large Pierce 20X action is epoxied in the chassis, which accepts a Rem-compatible trigger.

About RCC Brass — CNC Machined Quality
RCC manufactures brass cartridges on CNC lathes and mills starting with C272 solid bar stock. RCC reloading brass cartridges are manufactured to SAAMI, CIP, or customer specifications (yes custom cartridge and wildcats can be made). The brass does not use a conventional draw process. This allows the brass to be stronger, according to RCC:

“We machine all our cases on CNC lathes and mills and our case weight, case volume, and our case concentricity are the best available in the industry. We do not anneal the case head as it is hammer-forged to a high tensile strength which gives us the same hardness for each case. Since we use CNC equipment to manufacture our, case weight is nearly identical, the case volume is too, and our case concentricity is held to a 0.001”.

Since we are not held back by the limitations of a [traditional] draw system, we are able to use higher strength alloys to manufacture cartridges. Our C272 brass alloy has a much higher tensile strength and tighter molecular grain structure than C260 brass, without losing the needed elasticity. Test results have been very positive as we’ve had reports of increased in velocity and energy and lower shot deviations versus C260 drawn brass.

We manufacture high-quality reloading brass cartridges for vintage, obsolete, hard to find, and wildcat calibers. All cartridges are made to SAAMI, CIP, or tolerances provided to us. Our unique process allows us to manufacture over 1,500 different cartridges at tolerances up to 0.0005”. We manufacture reloading brass cartridges for any firearm.

We custom fit brass to the chamber of your firearm. Our custom fit program will give you the headspace and chamber dimensions best suited for your firearm. Customers can send us fire-formed brass, a chamber cast, or the firearm for the custom cartridge. We do Wildcats too. Send us a reamer drawing, or a dimensioned drawing and we will manufacture your wildcat cartridge. There is a one time set-up fee for all wildcats and a 100 piece minimum order. We do Custom Headstamps too. We use our CNC mills to engrave headstamps. We are able to do text and some graphics too.”