racerwong Posted July 21, 2017 Share Posted July 21, 2017 So this was briefly mentioned in the huge long X5 thread: http://forums.brianenos.com/topic/244144-p320-x5-thread/?page=29&tab=comments#comment-2796007 Not sure I saw a solution or explanation, so Im asking here. I recently swapped over from stock guide rod/spring to a tungsten + 14# 1911 spring and now my ejected brass is hitting my optic (see picture). Same ammo (Speer 147). Does this mean I need to goto a lower weight spring? (or higher)? Link to comment Share on other sites More sharing options...
bossgvr4 Posted July 21, 2017 Share Posted July 21, 2017 Is it hitting the lens too ? Link to comment Share on other sites More sharing options...
racerwong Posted July 21, 2017 Author Share Posted July 21, 2017 lens looks ok, gonna goto a lower weight spring and see Link to comment Share on other sites More sharing options...
MemphisMechanic Posted July 26, 2017 Share Posted July 26, 2017 I would switch to a lower weight spring for sure as a first step. One, because it's a handling upgrade with match ammo in 9mm Minor. Two, because the extra slide speed will result in more vigorous ejection and may take care of your issue. The next place I'd look would probably be at the angle / position of your ejector relative to another 320 without this issue Link to comment Share on other sites More sharing options...
racerwong Posted July 30, 2017 Author Share Posted July 30, 2017 Went to a 13# spring and it appears casings are no longer hitting the optic! Link to comment Share on other sites More sharing options...
bossgvr4 Posted July 30, 2017 Share Posted July 30, 2017 Is there any risk of premature wear if using a springweight that's not speficially tuned for your ammo ? I.e a factory load that is suited for 15# spring being used with a 13# spring Link to comment Share on other sites More sharing options...
JAFO Posted July 31, 2017 Share Posted July 31, 2017 Yes, although I'm not sure where the wear marks would start to show on a 320. On a P-series, you'd start battering the barrel lug on the locking insert. Link to comment Share on other sites More sharing options...
ELZEROGRANDE Posted July 31, 2017 Share Posted July 31, 2017 WHAT POWER FACTOR IS YOUR LOAD? Link to comment Share on other sites More sharing options...
racerwong Posted July 31, 2017 Author Share Posted July 31, 2017 The ones making these marks were Speer 147g which made 140PF. Link to comment Share on other sites More sharing options...
bossgvr4 Posted August 1, 2017 Share Posted August 1, 2017 (edited) I'm testing some 147gr 130PF this week with a 14# Wolff Variable rate spring. Edited August 1, 2017 by bossgvr4 Link to comment Share on other sites More sharing options...
ELZEROGRANDE Posted August 3, 2017 Share Posted August 3, 2017 On 7/31/2017 at 8:55 PM, bossgvr4 said: I'm testing some 147gr 130PF this week with a 14# Wolff Variable rate spring. Following. I notice my rounds hit the same spot. 14# spring at this time. Link to comment Share on other sites More sharing options...
MemphisMechanic Posted August 3, 2017 Share Posted August 3, 2017 For the record, a 147 is going to result in the slowest slide speed and the weakest ejection. Switching to a 135 or 124gr load might help prevent this from happening, with only a subtle shift in felt recoil. Link to comment Share on other sites More sharing options...
bossgvr4 Posted August 6, 2017 Share Posted August 6, 2017 Just tested some 147gr Coated, ~890fps rounds with teh Wolff Vairable 14#. No hits on the Romeo1 that I observed nor did I see any evidence of impact. YMMV Link to comment Share on other sites More sharing options...
racerwong Posted August 7, 2017 Author Share Posted August 7, 2017 (edited) 22 hours ago, bossgvr4 said: Just tested some 147gr Coated, ~890fps rounds with teh Wolff Vairable 14#. No hits on the Romeo1 that I observed nor did I see any evidence of impact. YMMV YMMV indeed.. this was from a friend today shooting 147g , 130PF 9mm. Tungsten rod, 14# spring. Edited August 7, 2017 by racerwong Link to comment Share on other sites More sharing options...
bossgvr4 Posted August 7, 2017 Share Posted August 7, 2017 (edited) 1 hour ago, racerwong said: YMMV indeed.. this was from a friend today shooting 147g , 130PF 9mm. Tungsten rod, 14# spring. Were they using a standard linear rate spring or a curved rate variable ? My understanding of the variable is that for the first portion of the compression it "acts' like a lighter spring, but at the working compressed length it stores the same energy as a standard spring. If I'm interpreting this right the spring is weaker during the first portion of the compression which allows the slide to move back faster. Getting the Romeo1 away from the flight path of the ejected brass, but has enough force when fully compressed to send the slide home. Edited August 7, 2017 by bossgvr4 Link to comment Share on other sites More sharing options...
racerwong Posted August 7, 2017 Author Share Posted August 7, 2017 11 hours ago, bossgvr4 said: Were they using a standard linear rate spring or a curved rate variable ? My understanding of the variable is that for the first portion of the compression it "acts' like a lighter spring, but at the working compressed length it stores the same energy as a standard spring. If I'm interpreting this right the spring is weaker during the first portion of the compression which allows the slide to move back faster. Getting the Romeo1 away from the flight path of the ejected brass, but has enough force when fully compressed to send the slide home. Standard spring Link to comment Share on other sites More sharing options...
9146gt Posted August 21, 2017 Share Posted August 21, 2017 Glock,M&P and now Sig's...brass hitting the Optic seems to be a FEATURE not a FAULT. Tom Link to comment Share on other sites More sharing options...
Steve RA Posted August 21, 2017 Share Posted August 21, 2017 I've got a FastFire III on a 1911 and have never had brass hit the red dot !!! JB was really ahead of his time ! Link to comment Share on other sites More sharing options...
9146gt Posted August 22, 2017 Share Posted August 22, 2017 I have a Fastfire 111 on a Baer .45 Bullyeye gun, it has been hit many times with the witness marks on the Optics. When in doubt try video Or just watch other shooters. Tom Link to comment Share on other sites More sharing options...
Steve RA Posted August 22, 2017 Share Posted August 22, 2017 You can vary the trajectory quite a bit by playing with the ejector length and how the end is shaped. Link to comment Share on other sites More sharing options...
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