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Artsi · 09-23-2002, 05:19 AM

In hunting rifles the brass grabbing is more important, and also more apparent than in our pistols.
Brass grabbing would lessen stresses to bolt head assy (sorry, cannot remember the real name for this part). Slide/barrel combo will start to retard simultaneously as bullet starts to accelerate. This is so in our P08's as it is in 1911 type firearm, and all other pistols as well.

A buch of years ago one local IPSC shooter had a 9mm Caspian (it's a widebody 1911). He shot in 'Major' Power Factor-class - (that means shooting 124grain bullet at about 1450fps). Some shooters deliberately loaded their ammo much stronger than this. It was found to generate more gasses and thus compensator was able to make use of this extra pressure/volume. That made shooting even more faster.

This shooter experienced unexplained ejection problems.
Shot fired. No spent case flew outta gun, but slide did rock back and forth as usual. Gently operating the slide by hand (without any extra effort) spent case was extracted from chamber and fell to the ground.

What was going on???

A group of shooters came to a conclusion that pressure within barrel (bullet not yet outta barrel) was so great that it made case to grab chamber very strongly. Extractor was unable to overcome this frictional load, and it's grip on extractor groove slipped.

I personally think that some timing problems may have been present on that gun with that load. If we think about it, it's not normal to see slide combo to come out of battery so much that case extraction is about to start - and still have the bullet travelling in the barrel !
To my experience, a touch heavier slide and accompanying stronger recoil spring would have most likely cured that phenomena.
Heavier slide would have had a negative impact on gun behaviour in recoil (as would heavier recoil spring), thus nullifying gained performance.

Every aspect in a pistol has to be in harmony. Whether we shoot much lighter (or stronger) loads in a pistol, surrounding mechanical bits have to be modified accordingly.

-Artsi

09-23-2002, 05:19 AM	#11
Artsi User Join Date: Sep 2002 Location: Finland Posts: 61 Thanks: 0 Thanked 0 Times in 0 Posts	In hunting rifles the brass grabbing is more important, and also more apparent than in our pistols. Brass grabbing would lessen stresses to bolt head assy (sorry, cannot remember the real name for this part). Slide/barrel combo will start to retard simultaneously as bullet starts to accelerate. This is so in our P08's as it is in 1911 type firearm, and all other pistols as well. A buch of years ago one local IPSC shooter had a 9mm Caspian (it's a widebody 1911). He shot in 'Major' Power Factor-class - (that means shooting 124grain bullet at about 1450fps). Some shooters deliberately loaded their ammo much stronger than this. It was found to generate more gasses and thus compensator was able to make use of this extra pressure/volume. That made shooting even more faster. This shooter experienced unexplained ejection problems. Shot fired. No spent case flew outta gun, but slide did rock back and forth as usual. Gently operating the slide by hand (without any extra effort) spent case was extracted from chamber and fell to the ground. What was going on??? A group of shooters came to a conclusion that pressure within barrel (bullet not yet outta barrel) was so great that it made case to grab chamber very strongly. Extractor was unable to overcome this frictional load, and it's grip on extractor groove slipped. I personally think that some timing problems may have been present on that gun with that load. If we think about it, it's not normal to see slide combo to come out of battery so much that case extraction is about to start - and still have the bullet travelling in the barrel ! To my experience, a touch heavier slide and accompanying stronger recoil spring would have most likely cured that phenomena. Heavier slide would have had a negative impact on gun behaviour in recoil (as would heavier recoil spring), thus nullifying gained performance. Every aspect in a pistol has to be in harmony. Whether we shoot much lighter (or stronger) loads in a pistol, surrounding mechanical bits have to be modified accordingly. -Artsi __________________ A golf course is a waste of perfectly good rifle range. (- someone in the net-)