Author Topic: BNM Bolt Probe Problems? (Read 22444 times))

Machinist · « **Reply #80 on:** May 03, 2018, 06:45:30 PM »

I believe Knifemaker said he made the slot that the bolt travels back and fourth in longer. I wonder if that would be better than having a longer probe? Could also do a combination of longer probe and longer slot?

Steve

ACZan · « **Reply #81 on:** May 03, 2018, 09:16:29 PM »

Proz83, thought we were on the problem.

This is what I have managed to gather from the posts of today.

ACZan, Side, 3.3000, Bad (shrouded & non-shrouded)
Kmaz, Rear, 3.625, Good
Proz83, Rear, ?, ?
Mudbugmitch, ?, ?, ?

Bob, I sent my share of photos, so my homework is done.

My photos had JSB Exact 14.35 gr pellets. Don't appear to be much different from the Crosman Premeir Dome Hunting pellet.

Nvreloader, nice job with the data. Thanks.

Machinist, I believe Knife' carved a notch in the end of the breech where the bolt sits before moving it into look position. Allowing him to ever so slightly get that pellet forward enough for a better position. Knife', correct me if I got that wrong.

ACZan · « **Reply #82 on:** May 03, 2018, 09:42:49 PM »

Also, I have not heard back from BNM Custom after I have requested for them to send me a return label or do an advance replacement option. Advanced replacement is great, because you just swap out the defective part with the good. Take the return label included with the replacement. Seal up the box and slap the label, good to go.

If you noticed, John from BNM claimed after looking at my photos that the barrel wasn't fully seated. So, I sent him the photo that I uploaded at Kmaz's request (on page 1 near bottom). The one showing underside of breech of the TP hole with barrel installed and pellet obscuring the port.

rsterne · « **Reply #83 on:** May 03, 2018, 10:08:52 PM »

Wonder what they will say when they see that photo, with the ports nicely lined up?....

I didn't mean to imply that you should have to change pellets to suit the breech, just the opposite.... The breech, IMO, should work with all commonly available, and popular, pellets.... I only mentioned it because it might explain why people are seeing different results for the pellet position....

There appears to be another anomaly I am noticing.... Some bolts seem to be 3.300" long, while others are 3.625".... If the difference is in front of the bolt handle (ie the nose and probe length).... that could easily account for a significant difference in the loading position of the pellet.... No idea what that means, different models (rear / side), calibers, or year of production.... but it could be part of the problem.... Whatever the deal, it seems BNM needs to come up with an answer, no?....

Bob

ACZan · « **Reply #84 on:** May 03, 2018, 10:22:46 PM »

Here we go. Finally figured out how to use the insert table button on the reply.

\|Member\|	\|Bolt Type\|	\|Measurement\|	\|Port Coverage\|	\|Notes\|
ACZan	Side (.22 Cal)	3.3000	Bad	(shrouded & non-shrouded) Length in front of bolt handle to probe tip 1.56"
Kmaz	Rear	3.625	Good	None
Proz83	Rear	?	?	?
Mudbugmitch	?	?	?	?
KnifeMaker	Rear	?	Bad	?

Bob, I am still waiting to hear what they have to say after my rebuttal on that explanation.

Mudbugmitch · « **Reply #85 on:** May 03, 2018, 11:10:18 PM »

Thanks Bob, I think I have a better understanding now about the bolt. As I said, I am no machinist, I will leave that up to you guys. I'm just a little miffed about paying $250 for a defective part.

I did hear back from John at BNM ;

Hello Mitchel

we are checking this issue right now most likely we need to send a new pin

Thank you !!!!

---
BNM products and services Inc

John

Hope this helps all of us.

ACZan · « **Reply #86 on:** May 03, 2018, 11:26:32 PM »

That 0.325" difference would be enough to get the pellet in front of the port in my breech.

Mudbugmitch, did he intend to say new bolt instead of new pin?

Mudbugmitch · « **Reply #87 on:** May 04, 2018, 12:31:13 AM »

His email to me.

"Hello Mitchel

we are checking this issue right now most likely we need to send a new pin

Thank you !!!!

---
BNM products and services Inc

John"

Hopefully it meant bolt. Hope this doesn't take too long. I'm Jonesing .

ACZan · « **Reply #88 on:** May 04, 2018, 12:38:38 AM »

I'm jealous. Haven't heard a thing back from John and you're getting a new bolt shipped to you. They want my whole breech back. Just joking

I'll probably have to call them tomorrow. Oh, btw I found this other email address referenced in my PayPal transaction with them. You guys could copy this address, as well when corresponding to BNM about the issue. Get them from every angle.

crazyforairguns@hotmail.com

pecor · « **Reply #89 on:** May 04, 2018, 04:00:43 AM »

ACZan, As I stated in a earlier post, I went Rounds with this BNM Custom's, {Fellow 2 years ago} with another problem of poor parts fit - screw holes, Sloppy undersize Bolt - Or oversize breech hole? Finnish was absolutely terrible, It looked like it was a Machine setup part! That was laying around the shop for a good year! PayPal sided with Me

I However Sent his Items back Anyway! With a Nasty Letter about his Machining Practices and Tolerances, So I no longer have An Iron In The Fire on this One. And have no plans for another BNM anything!

pecor · « **Reply #90 on:** May 04, 2018, 04:36:51 AM »

BNM version of bolt probe -- https://www.gatewaytoairguns.org/GTA/index.php?topic=52276.0
GMAC version of bolt probe -- http://www.gmaccustomparts.com/epages/BT3197.sf/en_GB/?ObjectPath=/Shops/BT3197/Products/002-0600

ACZan · « **Reply #91 on:** May 04, 2018, 06:10:36 PM »

Pecor, I took you off the list. Thought you might have some info to add to help illustrate what is happening. But, if your issues were something else or a long time ago, I'll be sure to remember that. Kinda forgot what you wrote on that reply.

BTW still haven't heard anything back from John at BNM Custom. Looking at that PayPal transaction I can still dispute up until June. So, I might have to start that process if I don't hear back from BNM. The money I'll get back will have to be spent to have a correct size bolt made by a more competent machinist.

Mudbugmitch · « **Reply #92 on:** May 04, 2018, 07:30:15 PM »

Hey, give the guy a chance. Even if he posted mine yesterday, it wouldn't get here before Monday or Tuesday. I got an email saying to look for tracking info out of the blue when I ordered the breech. I had sent him multiple emails for confirmation of my order , Nothing. Until the one about tracking. Maybe he's just not good at followup emails. I for one will give him till next week.

ACZan · « **Reply #93 on:** May 04, 2018, 08:01:14 PM »

MuDbugmitch, Hatsan had a lot of issues with poor business communications with customers. I was one of many victims of that. There are businesses who just never figure that out. But, BNM should be be jumping on that to correct outstanding issues with existing customers.

Pecor, I read through the other posts. Can't believe history is repeating itself, what..., five years later. The BNM machining seems to be all over the place. Now, I better understand your grievances.

Mudbugmitch · « **Reply #94 on:** May 06, 2018, 08:48:22 PM »

Well, thankfully I have more than one airgun. A few days ago I was so phyched that the breech came in. Now I kinda wish it hadn't, at least I would be shooting the Maximus. Poor thing, disassembled, laying on my desk, useless. But wait, I have other toys... Goody for me. Shot my regulated QB79 today, 800 fps, repeater, 100ft ragged holes. SWEEET I can give the guy this weekend, but believe me, I will be sending an email early tomorrow. I saw a phone number....has anyone ever called him ? 631-750-1586

ACZan · « **Reply #95 on:** May 06, 2018, 11:21:22 PM »

I will give a business two, maybe three business days to response. Then, I'll get a bit agitated. I'll do my best not to cuss, belittle or call names. However, there are businesses who really deserve it. I'll try to be as business professional as I can be. You anger them too much, and they will refuse to do anything. You have to be your own diplomat in these cases. I actually sent them two or three other follow-up emails with additional information. I'm getting the feeling they don't want to cover the return shipping. My guess is that Pecor ran into the same problem a number of years ago. BNM wanted him to pay for shipping. But, in this case, they only need to send the proper sized bolt to the affected customers.

Fortunately for me this will be a swap out when all parts are done and all known issues are worked out as best as possible. Until then, my junky barrel that the airgun tuner put on the gun will just have to keep spit-balling those pellets out with my best marksmanship and "The Force" to hit my targets. And, every shot has to be a kill shot, drawback to not having a repeater for quick followups. Quick followups may not be necessary once a properly machined L-W barrel is installed.

I have talked to Sergio before. Prior to making my purchase, I had to get a the distance from the groove of the dovetail scope mount rail to the top of the magazine. Had to be sure there was clearance between the magazine and the scope I will be transferring to the new breech and barrel. He is an Italian guy and has a bit of an accent. I believe his wife, Laura, answered the phone once or twice.

Pecor, is that GMAC breech pretty much the same, is it a good alternative to the BNM version?

pecor · « **Reply #96 on:** May 07, 2018, 06:35:12 AM »

{Pecor, is that GMAC breech pretty much the same, is it a good alternative to the BNM version?} I have no Clue. Would have to hit some UK forums to find out

I would guess. Looks like it has a nice thin probe on the end of the bolt, And look as though it has some o-rings for the transfer port ?

Mudbugmitch · « **Reply #97 on:** May 07, 2018, 01:51:37 PM »

Latest email from BNM

"Hello Mitchell

the best way too fix this is replacing the breech could you send the one you have back to us meantime we send you a new breech

thank you thank you !!!

---
BNM products and services Inc

John"

Well, I guess that means at my own expense... This project is costing a small fortune not to mention the time delays ...

pecor · « **Reply #98 on:** May 07, 2018, 03:01:38 PM »

Well at least your getting somewhere, I would make sure you get a tracking # when you ship it back. So they can't say you never sent it back!

Rob M · « **Reply #99 on:** May 07, 2018, 03:12:49 PM »

Quote from: pecor on May 07, 2018, 03:01:38 PM

Well at least your getting somewhere, I would make sure you get a tracking # when you ship it back. So they can't say you never sent it back!

id get it certified mail ! ( signature required

Thank you to our advertisers!

BNM Bolt Probe Problems?

Author Topic: BNM Bolt Probe Problems? (Read 22444 times))