Loaded Magazines vs. Downloaded: What You Need To Know

Main ideas / concepts

• Question addressed: Whether it’s a good idea to download one or more rounds in a magazine that will be kept in a loaded firearm.
• Core answer: “It depends”—specifically it depends on:
  • the firearm, and especially
  • the magazine design and capacity, because reliability varies with how compressed the cartridge stack is at full load.

Historical examples supporting the “depends” answer

Illinois State Police (1967 onward, Model 39)

• The pistol’s single-stack magazine held 8 rounds, with a 9th round in the chamber (8+1 = 9 capacity).
• They observed malfunctions when the magazine was loaded to 8 plus one.
• Reliability fix: they found the quickest solution was to download by one cartridge:
  • from 8+1 to 7+1 (8 rounds total in the gun), which improved reliability.

British SAS / Browning Hi-Power (P35) practice

• The Hi-Power is described as having a 13-round magazine with 14 capacity including the chamber round.
• SAS/bosses allegedly required loading no more than 12 rounds in the 13-round magazine.
• Consequence observed over time:
  • occasional jams on the first round with a fully loaded 13+1 setup.
• A cited shooting case:
  • the bad guy used a fully loaded 13+1 Hi-Power and the gun malfunctioned after firing one shot
  • the good guy stopped him before the malfunction could be fully dealt with

Modern resurgence example

• Interest in the Browning Hi-Power (P35 concept) is said to be returning (e.g., Springfield/TISAS copies).
• The speaker notes a reliability strategy:
  • use newer Mec-Gar magazines that hold 15 rounds instead of 13
  • these magazines are described as reliably functioning when loaded to capacity
• Lesson drawn: reliability is more about the magazine than the specific gun model.

Key mechanical concept: “wink” / flexibility in the cartridge stack

• “Wink” is explained as the flexibility / amount of give in the cartridge stack when the magazine is full.
• If the stack has enough flex (“wink”), then:
  • the magazine can be inserted during tactical reloads more smoothly
  • and the gun cycles more reliably, even with the slide forward

Glock example (contrasting 15-round vs 10-round magazines)

• Glock 19 OEM 15-round magazine
  • The top cartridge shows visible flex when pressed.
  • Result: even with the slide forward, a fresh magazine can be slammed in and locks reliably; the pistol cycles reliably.
• Glock 19 10-round (capacity-limited) magazine
  • The top cartridge stack allegedly shows near zero movement (“not moving a hair”).
  • Resulting problems described:
    • it may require pounding to seat it
    • loading may be unreliable during tactical reloads with the slide forward
    • increased friction/drag on the slide after firing the first round because:
      • the spring is at maximum compression
      • pushing up against the slide
      • potentially inducing malfunctions on the first shot

Small gun pocket-carry example: Smith & Wesson CSX

• The speaker describes the CSX as a very small carry gun.
• For pocket carry, they prefer the 10-round magazine (described as the “basic” magazine for that use case).
• With the CSX loaded to the 10-round level:
  • they say there is zero wink / zero flex
  • so the magazine cannot be inserted smoothly with the slide forward
• Loading workaround described:
  • lock the slide to the rear
  • insert the magazine
  • release the slide
  • load places a round in the chamber
• Practical recommendation given:
  • in a magazine-limit state, avoid topping off the magazine after a chambered round:
    • leave that chambered round as the chamber round
    • if limited to 10 rounds per magazine, the spare magazine should be 9 rounds, not 10
  • Reason:
    • during tactical reloads with a live-round in the gun, the magazine that seats smoothly gives 100% reliability every time

Practical “download” guidance (implicit methodology)

• The video does not give a single universal round count, but it supports a reliability-driven approach:

Reliability-driven loading method

1. Identify your specific magazine + firearm combination.
   • The same gun may behave differently with different magazine designs/capacity limits.
2. Assume that “full capacity” may eliminate cartridge-stack flexibility.
   • If the magazine is engineered such that the spring is fully compressed, the magazine may not insert smoothly.
3. Watch for signs that the stack has little/no “wink” at full load.
   • If the top rounds don’t flex and the magazine seats only by “pounding,” reliability risk increases.
4. Prefer “downloaded” loading when needed for tactical reload reliability.
   • Especially important when tactical reloads occur with the slide forward.
5. Use “one round down” as a reliability rule-of-thumb.
   • The speaker’s conclusion is: “One round down for sure is going to beat… one more round, maybe.”
   • Historical cases (Illinois State Police) and operational practice (SAS/Hi-Power) are cited.
6. Adjust spare-magazine loading in magazine-limit jurisdictions.
   • Example principle for 10-round states:
     • if you have 1 in the chamber, avoid setting spare magazines to their absolute maximum if they lack flex
     • keep spare magazines at one less than the limit (e.g., spare with 9 when the limit is 10) for smoother insertion.

Additional supporting comparisons

1911 .45 example (7+1 design philosophy)

• Designed around a 7-round magazine with 8th round in the chamber.
• Attempts to fit an 8th cartridge into flush-bottom magazines had mixed results.
• Mechanisms discussed:
  • reduced flex (“wink”) can make seating unreliable
  • can add friction on the slide, risking malfunctions on the first shot

AR-15 early 20-round magazines

• Soldiers carried with 1–2 rounds down to preserve spring flex for reliable chambering and emergency loading.
• Concern cited:
  • no flex can impair feeding when the bolt/magazine is used in reload/emergency conditions
  • added friction can affect first-shot reliability

Bottom-line conclusion

• There is no one-size-fits-all answer.
• Reliability depends heavily on magazine behavior—particularly how much cartridge-stack flexibility remains at the loaded capacity.
• Downloading by one round is presented as the safer choice when full loads reduce “wink” and impair smooth insertion during tactical reloads.

Speakers / sources featured

• Massad Ayoob (speaker; firearms training expert / author)
• Referenced organizations/practices (not direct speakers):
  • Illinois State Police (circa 1967 onward)
  • British SAS (described operational loading practice)
  • British military / English law enforcement agencies (general mention)
• Firearms/magazine brands/models referenced:
  • Browning Hi-Power (P35), Springfield Armory copies, TISAS Turkish copies
  • Mec-Gar magazines
  • Glock 19 OEM 15-round and capacity-limited 10-round magazines
  • Smith & Wesson CSX
  • 1911 .45 and Wilson Combat / Wilson ETM (8-round magazine mention)
  • AR-15 early 20-round magazines