Reloading Podcast 234 - Dings and Squibs

Hello, and welcome to the Reloading Podcast here on the Firearms Radio Network.  

Tonight the guys are covering squib removal, and how bad is a ding before you need to chuck the case.

  1. Hello I have been listening to the podcast and new to r loading. I have been reloading 300 Winchester magnum and 308 Winchester for my bolt guns. I have acquired a 5 gallon bucket each of 223 and 308 typically fired from AR platform rifles. My question is, while sorting out these cases I see many have small dents or dings on the case wall and some scratches on the necks, I assume from the ejecting cycle. Are these cases reloadable? At what point should I discard? Thanks Eric H. Via google voice

  2. Drew posted in RLP Group: What’s the best way to remove a squib?

  3. Hookom posted in RLPG: Another question for the group, I bought some Starline new brass for my new .243 bolt gun. Instead of measuring I'm just gonna run it through the WFT every time I resize. If you were going to trim every time, and it's .243 so there isn't much neck, would you trim at Max, Min or somewhere between. Max is 2.045" and Min is 2.035"

  4. Christopher posted in RLPG: Firearms related. Firing pin on my new .458 socom appears to be lightly piercing the primer every other round or so. Thoughts on sanding down the firing pin with some fine sandpaper. I was shooting a load that was at the bottom of the suggested load ladder. I also need some elevated scope rings oops.

  5. Chris posted in TRRG: Hi, I was pondering on whether or not to purchase Quick Load software. I know NOE bullet molds does a quick load spreadsheet for most of their molds and it seems like it would be a good investment, but I wanted to hear from people who own it.

    Also, I was wondering if it can give a rough estimate of muzzle pressure for different powders and barrel lengths for a specific cartridge. Thanks in advance to all that reply and have a wonderful day.

  6. American Insurgent





Cartridge Corner Notes: 7mm Mauser


The 7×57mm cartridge, also known as the 7mm Mauser, 7×57mm Mauser, 7mm Spanish Mauser in the USA and .275 Rigby in the United Kingdom is a first-generation smokeless powder rimless bottlenecked rifle cartridge. It was developed by Paul Mauser of the Mauser company in 1892 and adopted as a military cartridge by Spain in 1893. It was subsequently adopted by several other countries as the standard military cartridge. It is recognised as a milestone in modern cartridge design, and although now obsolete as a military cartridge, it remains in widespread international use as a sporting round. The 7×57mm has been described as "a ballistician's delight".


Many sporting rifles in this calibre were made by British riflemakers, among whom John Rigby was prominent; and, catering for the British preference for calibres to be designated in inches, Rigby called this chambering the .275 bore after the measurement of a 7 mm rifle's bore across the lands.


Optional Read:

7×57mmR (rimmed)


A rimmed cartridge was developed from the 7×57mm shortly after its introduction for use in break-action rifles and combination guns. A rimmed cartridge greatly simplifies the issues of designing an extractor, particularly in a combination gun or "drilling" which must also be designed to extract rimmed shotgun shells.


While various modern break-action and single-shot rifle and pistol designs have been developed that can reliably extract rimless cartridges, most of these date from the 1970s or later.


While the external dimensions of the two versions are nearly identical other than the rim, there are differences in the internal design. In particular, the cartridge web, the area immediately above the rim on the rimmed version or the rebate on the rimless version, is thinner in the rimmed case, and some authorities recommend limiting the rimmed cartridge to 41,000 CUP because of this.


Specifications

Parent case none

Case type Rimless, bottleneck

Bullet diameter 7.24 mm (0.285 in)

Neck diameter 8.25 mm (0.325 in)

Shoulder diameter 10.92 mm (0.430 in)

Base diameter 12.01 mm (0.473 in)

Rim diameter 12.10 mm (0.476 in)

Rim thickness 1.15 mm (0.045 in)

Case length 57.00 mm (2.244 in)

Overall length 78.00 mm (3.071 in)

Case capacity 3.90 cm3 (60.2 gr H2O)

Rifling twist 220 mm (1 in 8.66 in)

Primer type Large rifle

Maximum pressure (C.I.P.) 390.00 MPa (56,565 psi)

Maximum pressure (SAAMI) 351.63 MPa (51,000 psi)


Ballistic performance

Bullet mass/type Velocity Energy

8.0 g (123 gr) RWS KS 900.0 m/s (2,953 ft/s) 3,240 J (2,390 ft⋅lbf)

10.5 g (162 gr) RWS ID Classic 800.0 m/s (2,625 ft/s) 3,360 J (2,480 ft⋅lbf)

11.2 g (173 gr) RWS HMK 770.0 m/s (2,526 ft/s) 3,320 J (2,450 ft⋅lbf)

11.2 g (173 gr) Factory Military 700.0 m/s (2,297 ft/s) 2,746 J (2,025 ft⋅lbf)



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