[Freddie the Swede]

As I'm collecting parts for my 9 major project on my 2011 frame I'm interested in what mount you are using for your 9 Majors.
I have read several posts here and all say that brass ejection CAN be a problem when changing from 38 super to 9 major.
So I have read all but none seems to take the mount in consideration.
So far I have found that a single sided mount seems to be that way to go.
But which one?
Brand: Allchin, Brazos, STI, Shooters Connection or.......
Placement: Off center or normal??
Sight horizontal or canted??
New designs as Barrys or Quinn???

What are your thoughts???

What do I think? I'm thinking a Quinn with a C-more slide ride or a CPMI and an Aimpoint Comp XD.

//Fredrik

This post has been edited by Freddie the Swede: 12 February 2009 - 04:08 AM

[boz1911]

One open gun has an Allchin, one has a shooters connection, both work fine with no ejection problems. I have not tried any offset mounts like the Quinn or Barry, but a lot of people are loving them.

[WDB]

I shot with a serendipity for a little over a year and then went to a Barry, night and day for me. Barry mount is much lower and the tansition from iron sights to a dot should be much easier, another advantage is it really gets the gun in the air for those tables starts.

[Aristotle]

My gun went from .38 super to 9mm, and I have not had any ejection issues with my Serendipity. I can't find the video anymore, but someone on here posted a high speed video of a CMore on a single sided mount and the amount of "jiggle" it goes through was an eye opener.

[03k64]

Aristotle, on Feb 12 2009, 12:25 PM, said:

My gun went from .38 super to 9mm, and I have not had any ejection issues with my Serendipity.

Same when I converted mine, no problems with the Serendipity, though I'm sure my smith had a lot to do with that.

[ogiebb]

only had Serendipity...mine runs fine

[Albertl35]

ogiebb, on Feb 12 2009, 08:07 PM, said:

only had Serendipity...mine runs fine

+ 1 with an open Glock

[JThompson]

Aristotle, on Feb 12 2009, 11:25 AM, said:

My gun went from .38 super to 9mm, and I have not had any ejection issues with my Serendipity. I can't find the video anymore, but someone on here posted a high speed video of a CMore on a single sided mount and the amount of "jiggle" it goes through was an eye opener.

Quinn Mount

http://www.youtube.c...h?v=F-_d1WW0WiY

http://www.youtube.c...h?v=EwxH5-O7s4I

Another mount

http://www.youtube.c...feature=related

This post has been edited by JThompson: 12 February 2009 - 10:13 PM

[Aristotle]

There you are JT, yeah, that's the video. I couldn't seem to find it on Youtube.

having thought about it, and considering the shooters I've seen with them, how bad could this really be? I genuinely don't know, and I know you have put more than a little bit of thought in this and would know.

Just wondering what the adverse effects are, since it seems, you can only really notice it with a high speed camera. reliability maybe? Seems like a lot of really good shooters I've seen run these without any issues.

[JThompson]

Aristotle, on Feb 13 2009, 01:13 AM, said:

There you are JT, yeah, that's the video. I couldn't seem to find it on Youtube.

having thought about it, and considering the shooters I've seen with them, how bad could this really be? I genuinely don't know, and I know you have put more than a little bit of thought in this and would know.

Just wondering what the adverse effects are, since it seems, you can only really notice it with a high speed camera. reliability maybe? Seems like a lot of really good shooters I've seen run these without any issues.

It's all about dot tracking... if the mount flexes more the dot moves. Nothing is solid with that kind of force applied.

This post has been edited by JThompson: 14 February 2009 - 10:23 PM

[Aristotle]

I'm hoping a shooter in my area picks up your mount so i can give it a try sometime. My Open gun is about dialed in so I'm hesitant on changing any thing on it at this point. Definitely a solid, innovative design. Best of luck with it. :thumbsup:

[warpspeed]

I had a serindipity.

My 9major open gun was very intermittent. i attributed it to the brass. New brass was no problem. once fired had an occasional issue.

I think the extractor groove and the extractor itself, not to mention the ejector, play a huge role in the 9mm running 100%.

The more small things not being right will cause malfunctions.

Once I switched to the Allchin mount, it runs 100%.

[Jaxshooter]

I have two Anglin built 9mm open guns with Shooters Connection mounts. I have not had a single jam with either gun from day one. Hope this helps.

[Jody Waring]

I was amazed wih the amount of flex in the mounts in the video, and JThompson's was rock solid. Out of curiosity has anyone done video footage of a C-More with integral mount (2 legs)? Just wondering how much flex there is, I am seriously considering not using the single sided mount I was going to put on my Tanfoglio Open gun.

[splashdown]

Saw something interesting on the Quinn Mount videos posted above. Is that gun unlocking too early? First video, last cycle of the gun, there's a fireball coming from the ejection port as the brass is extracted, then ANOTHER as the next round is chambered. What does this mean? Is there something we can learn from this? 1st fireball = unlocking too early? 2nd fireball = significant unburnt powder in the chamber that was ignited from the hot chamber? I love these high speed cameras. We can learn so much from them.

splash

[JeffWard]

splashdown, on Feb 14 2009, 12:39 PM, said:

Saw something interesting on the Quinn Mount videos posted above. Is that gun unlocking too early? First video, last cycle of the gun, there's a fireball coming from the ejection port as the brass is extracted, then ANOTHER as the next round is chambered. What does this mean? Is there something we can learn from this? 1st fireball = unlocking too early? 2nd fireball = significant unburnt powder in the chamber that was ignited from the hot chamber? I love these high speed cameras. We can learn so much from them.

splash

That second flash is crazy... What the?

[jjanglin]

Id have to shoot the gun but it looks to me like it has too light a recoil spring in it.
Guys if your smith sets up the ejector and the extractor in good manner you
arent going to have ejection problems, and with the 9mm you have to make sure its (EJECTED SHELL)
isnt hitting the right top of the mag in front of the lip.
Mount should not be a problem if these things are good to go.
Some of the 9mm major guns Ive fixed it wasnt the gun but the load wasnt quite hot enough
Ive found that if ya keep the load up around 170 P.F. this helps launch the empty shell.!!!!!!

Jim/PA
Sailors Customs

[HSMITH]

That is unburned powder flashing IMO. The video isn't nearly fast enough frame rate to tell if it is unlocking early or not, would be easy to see taking the gun apart though.....

In 9mm I am a BIG fan of the mounts that open the ejection port. The ONLY reason to shoot 9mm is cheap brass, and this cheap brass is usually far from pristine. It isn't treated with the care that 15 cent per piece Super is, guys aren't roll sizing, etc. They pick it up once fired (yeah right, in a lot of cases who knows how many firings are on it) or pick it up at the range and try to run it in an Open gun. Range conditions play into this too, if you shoot mostly on sand or pick brass out of fairly soft ranges it won't be beat up nearly as bad as brass picked out of gravel, same goes for brass you buy. Most guys don't even sort by headstamp, in a mag I unloaded the other day I had 7 different headstamps and this is in a 140 mag. The mount that opens the ejection port lets me get away with things like that and have Limited gun reliability. With mounts that cover the ejection port you should be much more careful about brass. All it takes is one dinged rim to jam the gun when the ejection port is covered with a scope mount. Like a lot of things we do it is prevention and not reactive, if there is nothing in the way it can't hit anything, and I think it really it is a better way.

[shred]

JThompson, on Feb 13 2009, 01:27 AM, said:

Aristotle, on Feb 13 2009, 01:13 AM, said:

There you are JT, yeah, that's the video. I couldn't seem to find it on Youtube.

having thought about it, and considering the shooters I've seen with them, how bad could this really be? I genuinely don't know, and I know you have put more than a little bit of thought in this and would know.

Just wondering what the adverse effects are, since it seems, you can only really notice it with a high speed camera. reliability maybe? Seems like a lot of really good shooters I've seen run these without any issues.

It's all about dot tracking... if the mount flexes more the dot moves more. Nothing is solid with that kind of force applied.

It really doesn't matter. You can really only see flex (and they _all_ flex) at 1200 fps and then slowed down. Max shoots a single-sided mount. Todd shoots a single-sided mount. Eric shoots a single-sided mount...

[JThompson]

shred, on Feb 14 2009, 11:12 PM, said:

JThompson, on Feb 13 2009, 01:27 AM, said:

Aristotle, on Feb 13 2009, 01:13 AM, said:

There you are JT, yeah, that's the video. I couldn't seem to find it on Youtube.

having thought about it, and considering the shooters I've seen with them, how bad could this really be? I genuinely don't know, and I know you have put more than a little bit of thought in this and would know.

Just wondering what the adverse effects are, since it seems, you can only really notice it with a high speed camera. reliability maybe? Seems like a lot of really good shooters I've seen run these without any issues.

It's all about dot tracking... if the mount flexes more the dot moves more. Nothing is solid with that kind of force applied.

It really doesn't matter. You can really only see flex (and they _all_ flex) at 1200 fps and then slowed down. Max shoots a single-sided mount. Todd shoots a single-sided mount. Eric shoots a single-sided mount...

I shoot a single sided mount as well.... I also said everything has flex given that kind of force. I'm talking about dot movement though... If your dot stays in the reticle, as mine does, the less flex the better for tracking.

That's not even the primary reason I like the mount... I like it for the lack of parallax and for ejection.

[Gregory_k]

BMR mount.

[Tzygä]

jjanglin, on Feb 14 2009, 04:38 PM, said:

Id have to shoot the gun but it looks to me like it has too light a recoil spring in it.
Guys if your smith sets up the ejector and the extractor in good manner you
arent going to have ejection problems, and with the 9mm you have to make sure its (EJECTED SHELL)
isnt hitting the right top of the mag in front of the lip.
Mount should not be a problem if these things are good to go.
Some of the 9mm major guns Ive fixed it wasnt the gun but the load wasnt quite hot enough
Ive found that if ya keep the load up around 170 P.F. this helps launch the empty shell.!!!!!!

Jim/PA
Sailors Customs

You are right Jim. There was 8lb. old Wolff variable recoil spring from last summer. I haven't checked the spring jet. I just went first time this year to the range and shot 20 rounds to test the mount. The loads in that video were PF 172 and powder was VV3n37. I used Remington small rifle primer.

[Davidp1911]

Does these side C-More mounts like the Quinn and Cheely version make the gun feel left side heavy?

[PINMAN44]

The money people spend getting specific mounts, mags, brass etc. for 9mm seems kind of like a contradiction when it comes to the idea of shooting 9mm for open. Supercomp appears to be the better way to go when it comes to reliability and versatility. Feels like I'm spending money to try to save it. Law of diminishing returns. I like what Howard says with the concept of 9mm major. The idea is to use range brass and not to spend a crap load of money on things to make the gun run around the brass. If I could make the transition to 9x23 or supercomp I would.

I'm running a fairly hot round in 9mm major with a 115, knock on wood I have not had many problems with brass catching the mount. I use range brass that is used up like a prostitute. Standard STI mount for OKO.

I apologize for the drift.

This post has been edited by PINMAN44: 19 October 2009 - 02:32 PM

[PINMAN44]

Jthompson, btw really cool videos.

Thanks for posting them!