SKU: 5551764002

PETERSON BRASS 300 WIN MAG - LONG (50 PK)

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Description

PETERSON BRASS 300 WIN MAG - LONG (50 PK)Get more reloads on your . 300 Win Mag casings with Peterson's . 300 Win Mag Long. If you are a handloader that wants more reloads from your . 300 Win Mag casings, then you're going to love Peterson . 300 Win Mag Long casings. The regular . 300 Win Mag casing Peterson makes is the traditional SAAMI specd version that headspaces off the belt. This longer casing version different is different however, as it headspaces off the shoulder. Traditional . 300

Get more reloads on your .300 Win Mag casings with Peterson's .300 Win Mag – Long. 
If you are a handloader that wants more reloads from your .300 Win Mag casings, then you're going to love Peterson .300 Win Mag - Long casings. 

The regular .300 Win Mag casing Peterson makes is the traditional SAAMI spec’d version that headspaces off the belt. This longer casing version different is different however, as it headspaces off the shoulder.  

Traditional .300 Win Mag casings tend to show signs of case head separation after only 5 to 7 firings. This is because SAAMI specs for any calibre, list a minimum and a maximum tolerance for each dimension on the casing and the rifle’s chamber. With most calibers, the max dimension of the casing for length-to-shoulder (L-T-S) has the shoulder of the casing right up against the chamber wall. 

With a .300 Win Mag, unlike most other calibers, if your rifle’s chamber is cut to the SAAMI minimum for L-T-S, and your casing is at the max length-to-shoulder dimension, the casing shoulder is still .0095” away from the chamber wall. With the same minimum rifle chamber, a casing at nominal L-T-S is .012” away from the chamber wall. In a worst-case scenario, if the casing was produced at the SAAMI minimum L-T-S, and the chamber was cut at the maximum L-T-S dimension, the casing shoulder could be up to .026” away from the chamber wall. This is actually quite a a lot.
That large gap is what causes the casing to stretch so much when it is fired. And it’s that stretching that causes premature case head separation.

These .300 Win Mag- Long casings are made with a longer L-T-S dimension. (All the other dimensions are SAAMI spec.) Its longer L-T-S is what prevents the casing from stretching excessively on the 1st firing. The casing gets more support, which means less stretching and ultimately, a longer case life.

 

Additional Information

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.

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SKU: 5551764002

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steve
Pawtucket, US
★★★★★ 4
Good product but smell doesn't last
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Reviewed in the United States on December 19, 2025
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Imani S
Port Orchard, US
★★★★★ 5
Beyond my expectations…
Scent: Incredible 10/10. The entire shower smells like a spa afterwards. Woody notes, vanilla scent is deliciously heavy and warm, and even one pump delivers a punch of fresh vanilla scent to your entire body. I’m a woman who is in love with heavy earthy scents and this is it! P.S it also matches well with scents like vanilla, cocoa butter, chocolate, or even delicious “smore” scents! I pair it with vanilla and cocoa butter scented deodorant, vanilla perfume, or vanilla body lotion and it works amazing! Longevity: Lasts the entire day if I’m staying home just relaxing, not working out or sweating very much. I could shower in the early morning and by the time my head hits the pillow I still smell it faintly! If I’m out and about it still lasts hours I’d estimate around 6-8 hours before the scent fades! If I shower at 6am, come home at 5pm-6pm after work I still smell fresh! (I always shower 2x a day but you don’t even need to with this! Value for Money/Size: Oh absolutely! I think I bought this soap two weeks ago? Used it nearly every day, and you can’t even tell! One pump is enough, two pumps MAX per shower per day. I decided to lavish myself by buying this soap, because it’s a bit more pricey. But it’s actually saving me more money, at this rate I’ll be buying another one of these every 3 months! So that’s…4 times a year? 5 max? That’s incredible. I’ll probably stick with Cremo for life honestly. And I’m a woman!💕🎀
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Reviewed in the United States on March 7, 2026
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Light-Zone
Cuba, US
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High Quality and Smells Great!
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Reviewed in the United States on April 10, 2026
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Ebin buy :D
Fort Morgan, US
★★★★★ 5
Best vanilla body wash I've seen
Proper vanilla scent with a kick, without the vomit inducing synthetic aftertaste
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Reviewed in the United States on May 26, 2026
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Christopher McMakin
Bozeman, US
★★★★★ 5
A major upgrade from standard drugstore brands—sophisticated scent & better lather.
I have been a long-time user of standard body washes (think Old Spice, Axe, or Dove Men), but I kept seeing hype about Cremo and decided to see if it was worth the slightly higher price tag. After using the 32oz Spice & Black Vanilla for a week, I can confidently say this is a massive upgrade for your shower routine. ​Here is how it stacks up against the typical grocery store brands: ​1. The Scent is on another level: Most cheaper washes smell like generic "Sport" or "Ocean" cologne. This scent is much more complex and earthy. ​Top Notes: It starts with a sharp, spicy kick (that's the cardamom). ​Finish: It settles into a smooth, warm vanilla and tobacco scent. It smells more like a high-end department store fragrance than a soap. ​Staying Power: The scent actually lingers. If you shower in the morning, you will still catch subtle hints of the warm spices for a few hours, which pairs really well with woody colognes. ​2. Performance & Feel: The consistency is thicker than what I'm used to. You only need one solid pump to get a rich lather with a loofah. Crucially, it rinses clean without leaving that "squeaky" residue that dries out your skin, but it also doesn't leave a slick oily film like some ultra-moisturizing washes do. It hits a perfect balance. ​3. Value: The 32oz bottle is substantial. Because the gel is concentrated, I expect this bottle to last 3-4 months easily, making the cost per ounce very reasonable compared to buying smaller bottles of cheaper stuff every few weeks. ​Pros: ​Sophisticated, "grown-up" scent profile. ​High-quality pump (sturdy, doesn't clog). ​Non-drying formula is great for colder months. ​Cons: ​Potency: The scent is strong. If you are sensitive to fragrance or prefer unscented products, this might be overwhelming. The bathroom will smell like it for a good 20 minutes after you're done (which I enjoy, but keep it in mind). ​Verdict: This bridges the gap between basic hygiene and luxury grooming. If you are tired of smelling like "Blue Sport" and want something warmer and more refined for the fall/winter, this is absolutely worth the switch.
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Reviewed in the United States on November 26, 2025

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