Peterson Brass 6mm Dasher Unprimed Box of 50

Peterson Brass 6mm Dasher Unprimed Box of 50
Peterson Brass 6mm Dasher Unprimed Box of 50
Peterson Brass 6mm Dasher Unprimed Box of 50
Item #:PCC6DASH50
$1.25 per piece
Shipping: One flat fee of $12.95 per online order.
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Due to the packaging and shipping process, case necks are often slightly dinged or bent and need to be rounded up and sized to give proper neck tension. New and/or fired cases must be full-length resized or have the expander ball of the sizing die run through the case neck prior to loading.
Read 7 Reviews

Product Information

All Peterson Cartridge casings come in one of their plastic ammo boxes.

Made in the U.S.A.

Featuring a 40-degree Ackley-type shoulder and 10 percent more case capacity over the parent 6mm BR case, the 6mm Dasher has been used to set records in the 600 and 1,000-yard benchrest community, and has become a favorite among competitors in the Precision Rifle Series as well.  

“The PRS community and the long-range benchrest guys are groups that are important to us” stated Peterson Cartridge president Derek Peterson. “We already make most of the common PRS cartridges, so the 6mm Dasher was naturally next in line for those guys looking to compete with a long-range 6mm, with minimal recoil. The 6 Dasher is one of those cartridges that packs a ton of power and performance in a tiny package, and we decided to make them based on requests from our friends in these disciplines” Peterson said.

The 6 Dasher made by Peterson are offered in Small Rifle Primer (SRP) pocket size only. They have a .060” flash hole diameter, same as Lapua’s small rifle primer pockets. They will require a small de-capping pin, just like Peterson’s 6 BR casings. There is no SAAMI or CIP spec for 6mm Dasher. So, the caliber development guys at Peterson had to decide which dimensions they were going to make their casings to. Regarding Length-To-Shoulder (LTS), Peterson consulted the Sierra, Berger and Lyman reloading manuals and designed the Peterson 6 Dasher casings to comply with the guidance from all three manuals. 

Regarding Overall Length (OAL), Peterson researched all the popular chamber reamer sizes, and decided to make its casings with an OAL of 1.53” + or - .0005, so they’ll fit in the common 6 Dasher chambers. The base diameter of Peterson 6 Dasher is the same as the base diameter of its 6 BR casings. Plus, these Dashers have the correct neck wall thickness of .0013”. 

Peterson concluded, “No more need to fireform or hydroform 6BRs. Now you can get properly headstamped 6mm Dasher, with the ideal neck wall thickness and harder heads than the other competitors.” 

Warning: Only use Peterson Cartridge Co. casings in firearms in good condition, designed, marked, and chambered for this cartridge. Do not use Peterson Cartridge Co casings for “fire forming” or any other purpose other than what they were designed and tested for. Peterson retains no responsibility for the enclosed casings if they are used outside of the manufacturer’s recommendations.


This is not loaded ammunition.

Read 7 Reviews - Average Rating: 5 stars

Peterson Dasher Brass

By Steven R. on Jan 10, 2023
Looks like solid stuff. Can't wait to get it to the range.


By JANEE P. on Feb 10, 2021
This brass is beautiful and so consistent!

Peterson brass, 6 Dasher 👍🏻

By Don S. on Nov 24, 2020
Very well-made uniformed brass. I don’t know how many firings this brass is good for but stay tuned. Don’t speculate, just buy.

nice brass

By James H. on Nov 24, 2020
Nice brass. Packed well so no dents in case necks. I measured the necks at 13.5-14 thousandths. The Lapua I have is all 13 thousandths. Will be buying more.

Petersen 6mm Dasher Brass

By Michael R. on Nov 24, 2020
Excellent consistent brass. Uniform primer pockets.

Peterson 6 Dasher Brass

By Timothy C. on Oct 13, 2020
I am reporting my likes about the Peterson 6 Dasher brass. Its weight is very uniform also the neck thickness although thicker than what I have used in the past was very consistent. I am very happy Peterson decided to make Dasher brass.

Very Well Made Brass

By Hurtford S. on Oct 07, 2020
It is a lot heavier than the fireformed Lapua, so do adjust your loads downward and work up
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