Porting done right should not effect accuracy. Gas pressure is applied equally on the bullet base through a ported barrel. How is the crown on the barrel? If there is a nick you or uneven crown that might be the source of your fliers. I am not a gunsmith but I doubt the porting is the source of your issues. Was the replacement barrel a full sized barrel or a detective barrel?

 

No obvious nicks on the crown. Looks clean to the eye even with my cheater readers on. I tried another FM Detective barrel not a full size barrel. I attached some pics.

 

Man Scott, that is perhaps the nicest Detective I have seen. Bob does great work, and he has worked on about 4 of my Hi Powers. I am always pleased. Although expensive, the DLC finish is great. Enjoy!

Re the fliers, I am more of a HP enthusiast than expert, but could it be the bushing to barrel fit?

 

Thanks Todd. I immediately fell in love with it when I saw it.

Seems that maybe I seen on a BHsprings video that a recoil spring can cause you to have flyers, something about not fully seating..... Maybe @slav will check in!

The springs and guide rod seem to seat fine. If I put in another non-ported FM barrel with same springs and guiderod, the problem goes away.

 

Seems that maybe I seen on a BHsprings video that a recoil spring can cause you to have flyers, something about not fully seating..... Maybe @slav will check in!

 

Or Mark as Slav or if we are lucky even Leon Hubert . LOL

 

The cons of porting:

It makes the gun noise louder to the shooter just like a muzzle break does. It makes a weakened spot in the barrel. It allows crud to enter the firearm that would not enter if it was not ported. Other than that, it should be all good, but with no guarantee.

 

Nice looking pistol! I would suspect that the fit of the barrel would be more likely to cause fliers than porting would be. I would compare the fit of the two barrels, and see where they differ. I'm certainly not a Hi-Power expert, but I do know one...

 

Given that the '..fliers..' only seem to occur with the ported barrel (and even then only occasionally at that).....but not at all with the other barrel....odds are that the seating / fit of the ported barrel seems more likely to be problem.....than the porrting.

 

If everything tidies up with a barrel change then you've kind of found your own answer. Good barrel, well ported should have no issues- Could be rough or uneven finishing on the rifling side of the porting, could just be that the barrel, pre porting, was a bit ropey to start with, ( rifling/crown/chamber spec/locking lug ) and the other barrels happen to be a bit better- luck of the draw.
It could be that the porting is causing you to unconciously flinch a little more than the regular barrel.
I would keep the unported barrel in there if it's an option- gun will look the same.

 

I have one of the BHSS FM Detective Barrels in another of my guns. Based on the feedback, I'll just order another one. Then I'll just save the ported barrel to go with the gun if my kids decide to sell it when I'm gone.

That's another subject though . . . I get the sense we are mostly older guys on this forum . . . do any of you have kids or grandkids that are into Hi Powers? I have tried and tried with mine and they are just "meh". I may luck out with 1 nephew but it's still not certain. I had a custom alloy Hi Power done for him and gave it to him on his birthday as a blatant bribe. Fingers crossed.

 

Really nice looking Detective.

 

That gun is gorgeous

 

>>...do any of you have kids or grandkids that are into Hi Powers? I have tried and tried with mine and they are just "meh". I ...<<<

A couple/few decades ago, the firearms industry discovered '..product placement..' in films, TV and video games as a means to generating interest and boost sales to a younger demographic. The Browning Hi Power missed that boat. They thought that simply producing one of the world's finest, most durable, every-application-practical pistols of the century was enough. These days if a pistol doesn't have more snap-on-snap-off accessories, gadgets, lasers, lights, bells 'n whistles, etc. hung on it like a Christmas tree....well...it just ain't good enough and certainly not cool. Style vs. substance.

 

There is something to say

The Browning. Elegant simplicity. Breathtaking aesthetics.

 

There's something else that I've noticed (or perhaps failed to notice) but I don't ever recall seeing a Browning Hi Power ad with a 'babe-in-a-bikini,' with cleavage to rival the Grand Canyon, fondling a Hi Power on the glossy pages of Guns & Ammo, American Rifleman etc. magazines. Go figga' ??

 

There's something else that I've noticed (or perhaps failed to notice) but I don't ever recall seeing a Browning Hi Power ad with a 'babe-in-a-bikini,' with cleavage to rival the Grand Canyon, fondling a Hi Power on the glossy pages of Guns & Ammo, American Rifleman etc. magazines. Go figga' ??

Perhaps we just missed it while admiring the sexy lines of the High Power...

Cheers,

Tim

 

Ah...of course....That must be it. What was I thinking ??.

 

Honestly, I haven't run into this before, ,but I haven't had a ported HP through the shop either. What I find most curious is that it does it about every 5th round, which would indicate to me that maybe there is a build up of something from the first four rounds. Shooting lead or jacketed? After it throws the flier does it go back to the original group or continue with the fliers? If it straightens out after the flier and then repeats that pattern, then I suspect that there is a build up somewhere around perhaps one of the ports that cleans itself out. Actually, I would look inside the slide. There isn't much clearance between the slide and barrel in the ported area, so perhaps there is build-up of powder or lead/copper that is pushing the barrel off to one side, and when there is sufficient crud there the barrel cycling cleans it off and you're back to the races.
Check the ID of the slide around the port on both sides to see if there might perhaps be something visible there might be a cause.

 

Thanks Don. I will take it the range and check for these items and let you know.