I picked up a new Limited 10mm and first time out it really slung the brass plus put a ugly hit into the brass. I know others have shortened these to remedy the effect since Tanfoglio uses one size to do from .22LR-.45ACP. My other Limited 9mm just dribbles the brass out not even a foot away with the same ejector. Not the case for the 10mm and this one is the worst so far! Yesterday was my first visit since taking the sharp point off and cutting it down just a little. No nasty marks and instead of 30' it was about 25' and still on the concrete instead of the dirt!
Stock 9mm Limited ejector left and 10mm Limited ejector first cut on the right
(https://fbcdn-sphotos-f-a.akamaihd.net/hphotos-ak-prn2/1237824_592630950774941_1758278956_n.jpg)
Someone went extreme on one but didn't hear the actual results
(http://www.hunt101.com/data/557/394945_Super_Eject4.jpg)
My plan is to get some PPU and keep chopping it down until that dribbles out. Should be the weakest load that will still need to eject properly.
I remember reading about that modification, changing the length and angle can help with how far and where the brass ends up.
However the higher impulse rounds will still fly, given the slides rearward velocity. :o
Finding a balance between the recoil spring rate to absorb the slide's velocity helps but having a spring rate that makes the slide difficult to retract is detrimental to defensive purposes, where you may need to perform a tap/rack function, clear a jam or if your strong hand is injured and need to resort to weak hand manipulations and shooting.
I know we like the higher impulse/velocity ammo ;D but that too comes at a price that affects everything mentioned above.
Best of luck and report back the changes as they relate to changes of how far and where the brass ends up. 8)
Given where I am in relation to that picture, the next pass will be at least double.
I have been getting info from Nealio and he is even shorter (.320") getting 12' ejection distances.
(http://www.brianenos.com/forums/uploads/monthly_10_2013/post-23941-0-78421000-1380952923.jpg)
Cutting it down will help some but that speed of the brass traveling back to it will still always be a factor.
Worked on two of mine today. With the amount of "meat" that needed removed I opted for the Dremel with carbide burr ;D
Elite Pro I cut to .362"
Elite Limited I cut to .348"
I will report back when I try them this week.
Elite Limited PPU 180gr FMJ
Didn't record them (hindsight). Most were 11'-13' and this is somewhat subjective due to rolling. The first number is FPS reading on the Chronograph followed by distance I measured with a tape.
Limited Pro PPU 180gr FMJ
1089 17'
1105 23'
1065 8'
1102 23'
1084 8'
Elite Limited Armscor 180gr FMJ
1159 13.5'
1154 9'
1152 13'
1162 18'
1151 13'
Limited Pro Armscor 180gr FMJ
1142 5'
1142 13'
1164 9'
1149 8'
1157 10'
Elite Limited Underwood 180gr TMJ
1298 40'
1298 40'
1310 16'
1309 14'
1319 23'
Limited Pro Underwood 180gr TMJ
1341 13'
1330 15'
1335 10'
1317 30'
1327 20'
I think next cut I will put all the 10mm ejectors at .300" and stop. You could go to a nub but still can't change slide speed. Wonder how long the 1006 ejector is? I know it doesn't sling the brass bad.
They are a small thin stainless piece and are a little long, I haven't tried adjusting the ejectors. One reason is replacement parts are limited. Also with me shooting various conversion barrels I don't want to mess up ejection of the 40S&W or the 9x25's. But the recoil spring does help them in the ejection distance for the S&W 10xx series.
With my factory spring it was difficult to find brass out at 25' to 30'+ (at 4:30 right and rear)( I don't think I have had any go 40')(although those that were lost may have achieved "LOW EARTH ORBIT").
With the 22 lb spring this was 8' to 15' depending on the ammo impulse. (full impulse 40 AMMO is like 4') Occasionally some of the experimentals (max + loads) still reach 18'-20'... :o If I would use the 24 lb spring I sure the distance would be shorter... ::)
The 9x25 is a unique in that it drops out right to the side of the shooter, 2' or 3'. I think it has to do with the necked down casing.
Quote from: The_Shadow on October 09 2013 10:20:55 AM MDT
They are a small thin stainless piece and are a little long, I haven't tried adjusting the ejectors. One reason is replacement parts are limited. Also with me shooting various conversion barrels I don't want to mess up ejection of the 40S&W or the 9x25's. But the recoil spring does help them in the ejection distance for the S&W 10xx series.
With my factory spring it was difficult to find brass out at 25' to 30'+ (at 4:30 right and rear)( I don't think I have had any go 40')(although those that were lost may have achieved "LOW EARTH ORBIT").
With the 22 lb spring this was 8' to 15' depending on the ammo impulse. (full impulse 40 AMMO is like 4') Occasionally some of the experimentals (max + loads) still reach 18'-20'... :o If I would use the 24 lb spring I sure the distance would be shorter... ::)
The 9x25 is a unique in that it drops out right to the side of the shooter, 2' or 3'. I think it has to do with the necked down casing.
The 9X25D is unique, in relation to the .40 calibers. They only share the case head and wall diameter. The ejection event is determined primarily by the caliber diameter, as a force applied. Smaller diameter is less force applied, for given near equal pressures. The (typical) longer barrel of the 9X25 will also reduce the overall force of the ejection event, as it also does for larger calibers, but NOT as a reason of mass. Barrel volume is a time factor, which delays the ejection event, however slight, both in the time needed to expel the bullet from the muzzle, and time allowing powder to be consumed (decreased gas expansion) and gasses begin to condense before the event. Mass is relevant more to "feel", as the barrel is stationary until the ejection event begins.
In regards to the length of an ejector, longer can, and often does, reduce the ejected case distant. Although the ejector may engage the case earlier, it also adjusts the angle and most often imparts more "spin" onto the case, which will slow the exiting velocity more rapidly. It's more than only slide velocity and ejector engagement. There are many contributing factors. Changing one will affect the dynamics of all the others. Shortening the ejector is a less effective method of controlling ejection results, as it also increases the variables between power ranges of the different cartridges.
Tomorrow is cut day down to .300" which is my stopping point. I will post a picture or two tomorrow.
Stock ejector length .545"
(https://scontent-a-atl.xx.fbcdn.net/hphotos-ash3/995506_599766296728073_1588174503_n.jpg)
My cut ejector length .300"
(https://scontent-a-atl.xx.fbcdn.net/hphotos-prn2/1385938_599766526728050_1048144335_n.jpg)
Left is stock length 9mm ejector next to the other three 10mm's cut to .300"
(https://scontent-a-atl.xx.fbcdn.net/hphotos-prn2/1382157_599766950061341_595334215_n.jpg)
I shot them all today. This modification has really reduced the distance as some hit 5'-6' (weaker stuff) but the hot stuff goes 20' (no 40's or even 30's today). Today I was in the center station and only one went off the concrete ~ 20'. In the past I had what I called "10mm hill" which was about 6' off the right of the concrete. Many times even when I shot from the far left station they hit there!
IMO I think their isn't much meat or gain to shorten it more.
Today I had some hot stuff but nothing went over 20' and stayed on the concrete. Most were 6'-12' so this mod helps a good bit. If you don't plan on going to another caliber get cutting!!
Interesting mod. I finally took my match to the range this week with the 22 pound spring, still waiting for some of the brass to land. Might have to give this a try.
It's for sure worth doing if you don't plan on running another top on there. I think another test is in order today swapping the 9mm upper on one of the cut lowers. The 9mm Limited dribbles the brass out at full length, this could cause stoppages on the cut lowers if the brass doesn't clear. We will see in a couple of hours!
With the 9mm top off the Limited installed on the Pro it ran fine. No stoppages and the brass dribbled like the uncut Limited lower.
Interesting project. I'll be adding this one to the list for sure! Today's range brass showed no signs of ejector damage, but just keeping the distance down would be a plus.