Peterson Brass Belted Mag Basic Unprimed Bulk Box of 250

Peterson Brass Belted Mag Basic Unprimed Bulk Box of 250
$2.01 per piece
Shipping: One flat fee of $12.95 per online order.
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Availability:Less than 5 in stock
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 2 Reviews

Product Information

This is a Bulk package of Peterson Cartridge casings, they will not come in one of their plastic ammo boxes.

Made in the U.S.A.

Now offering Basic Brass in the Belted Magnum calibers. 

Peterson Cartridge makes finished casings in the popular belted magnum calibers, like .300 Win Mag. and 7mm Rem Mag. According to president Derek Peterson, “We’re now offering belted magnum basic brass for those customers who want to form it into their favorite belted caliber.” 

Common belted calibers that the basic brass can be formed into include: 

  • .350 Rem Mag.
  • .338 Win Mag. 
  • 8mm Rem Mag. 
  • .264 Win Mag. 
  • 6.5 Rem Mag. 
  • .300 H & H Mag. 

Dimensions of Peterson Cartridge Basic Brass:

  • Head diameter: .528” 
  • Overall Length: 2.89”
  • Opening at mouth: .494” 

Peterson concluded, “If you have a magnum caliber gun you can’t get brass for, or if you just like to experiment, see if our belted magnum basic brass can get you the outcome you are looking for.” 


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 2 Reviews - Average Rating: 4 stars

Brass Not Length Shown

By Jeanette R. on Apr 23, 2023
Disappointed with this brass. Uniform 2.86" and not the 2.89" shown. Maybe nit-picky for some, but I wanted this extra length for my .450 Watts.

Peterson H&H Belted Wildcat Tubes

By Ronald B. on Mar 17, 2023
Most uniform brass I ever measured for length and weight new, unfired, right out of the factory box.
Sample of 10:
Length mean was 2.8614" and all were within 2.861" to 2.862".
Weight mean was 254.0 gr., ranged from low of 253.1 to high of 254.6 grains.
Any variation noted might be as much due to my measurement instruments as to the brass.
Prettiest brass too. Nicely annealed at neck then polished shiny for delivery.
Sectioning of a couple of cases showed thicker head than any other case I have sectioned (W-W, R-P, Hornady, Norma) but usual case wall thicknesses above the base at 1-1/4" and 2-1/4" from base and at case mouth: 0.018", 0.011", and 0.010" respectively.
Fire-forming is pending, with normal starting load.
I reckon it will take less powder than my usual max loads to give same or better results with the Peterson brass.
I also reckon the Peterson brass will outlast other makes in number of reloads possible.
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