Clean cold MOI

Orange Dust

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Joined
Oct 23, 2015
Messages
1,580
I"ve gone the opposite route using the Machine gunners Lube as my protectant for all my barrels.

The chemistry is complex but you can read about it here:

https://www.sprinco.com/mgl.html

I've been using it for about six years now in all of my rifles and all I can say is that it seems to do exactly what they claim it will.

You will never have to worry about it building up in your bore either if you simply apply it on a wet patch then run a dry patch or two to remove the excess.
Never heard of it before. Ill study up on it. Thanks for the tip. HBN is a pain, but it does work really well if you do it right.
 

Orange Dust

Well-Known Member
Joined
Oct 23, 2015
Messages
1,580
I"ve gone the opposite route using the Machine gunners Lube as my protectant for all my barrels.

The chemistry is complex but you can read about it here:

https://www.sprinco.com/mgl.html

I've been using it for about six years now in all of my rifles and all I can say is that it seems to do exactly what they claim it will.

You will never have to worry about it building up in your bore either if you simply apply it on a wet patch then run a dry patch or two to remove the excess.
I think I'm going to give it a try, at least in my AR. I don't use HBN in those things. the one I have in .22 Nosler will be a perfect candidate. It is very accurate.
 

Greyfox

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Jan 21, 2008
Messages
5,384
Location
Northeast
I have had pretty good success maintaining cold bore accuracy, quite critical for LRH and PRS competition. While I have a few rifles that could do this from a “clean’ and cold bore, I will still prepare with a fouled bore, generally 2-6 shots fired from the rifle. It’s also important to understand how many shots can be fired, holding cold bore accuracy, between cleanings. For my PRS rifles, this is a minimum of 200 shots, my hunters, a minimum of 40 shots....All this with group size and cold bore shot contained within .5MOA with velocity within an SD of 10. While this may sound like a tall order, or even BS, it’s quite possible to achieve this. My basic approach:
-Start with a good barrel that has been properly broken in and demonstrated stabilized velocities. This can be 20-200 rounds fired. While I have achieved sufficiently good results with factory barrels, it can be hit or miss and my best results have come from quality custom barrels.
-Develop a load that that has been optimized with a maximum for a minimum of .5MOA at the maximum range of use with no more then a 6FPS change in velocity per .1gr change in charge weight over a .5gr range. Of course, other “best practices” practices with load development( runout, neck tension, etc) should be followed. All this may take some time and effort, but IMO, it’s well worth it for LR Precision work. As with barrels, one can be lucky and find a factory load that can meet these requirements but it’s hit or miss, and lot to lot differences can reek havoc.
-Consistency in the cleaning regiment is important, I will use a good solvent like Boretech Eliminator, visually removing carbon and copper using a bore scope. I then run a patch of a Montana Blend Bore Conditioner, wipe with a clen patch. Unless, the rifle will be stored or the bore subjected to the elements, I will only clean when I get close to the shot numbers previously mentioned.
-For fouling, I will simply fire the number of rounds required to bring the group on zero, and stabilize velocity. At this point I will test the number of shots before the accuracy and or bold bore falls out. With a good barrel/load, this can be surprisingly high,
but I will avoid overdoing it as to avoid excess copper build up or a carbon ring.
I do not use any of the coatings like Moly or HBN preferring to keep the process simple. There have been some cases where no matter what I do, I can’t keep my cold bore in the central group. If it’s a consistent cold bore placement, I may use the rifle and make the sighting adjustment, but will usually either continue working on the load, or scrap the barrel......I set there are lots of ways to skin this cat.....this works for me.
Shown:my PRS rifle. At 200 yards.
5A789CE0-81D0-432C-B124-BADD834B5D4F.jpeg AF05BCD7-AF37-481F-B355-FABB3A383B12.jpeg
 

snox801

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Joined
Sep 19, 2012
Messages
2,846
Location
Spring Lake Michigan
That’s with a 6mm Comp Match, 6.5 Creed, and 7mm Rem Mag. Here’s a picture of the quick group I literally just shot to reconfirm zero with the 6.5 Creed. Only 3 shots at 100 but it’s pretty telling. I also don’t jam any of my loads into the lands because they are all hunting rifles. I start at 15-20 thou off and chase them when the groups start to open up...could be why I don’t see what you’re seeing.
View attachment 169172
Well that has nothing to do with your cleaning. I mean it is a creedmore btw.
Most will shoot that groups at 1000 without even trying.
 

Orange Dust

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Joined
Oct 23, 2015
Messages
1,580
I have had some hbn for a while now just haven’t used it. Think I may try it with the 390gr atips in my .375 AM.
Clean the bore to the bare metal, and I mean clean!! before you do. Also, treat the bore with it and then shoot at least 3 with a reduced load, a grain or two will do before going ahead. Then load to your previous velocity. May take a grain more. If groups are worse play with seating depth, not charge. Assuming it shot well before.
 

Orange Dust

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Joined
Oct 23, 2015
Messages
1,580
Kirby built it so of course it shot well. Lol
Much better than I could anyway.
I would love to have one of Kirby's guns. I know it will shoot well. Maybe I misspoke... Assuming you were happy with the previous load and don't want to develop a new one??? Better???
 

snox801

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Joined
Sep 19, 2012
Messages
2,846
Location
Spring Lake Michigan
I know I got what you were saying.
He builds great rifles I only get to use mine once a year as Michigan is not known as a long range state. But I wanted my dream gun so I did it.
 

Orange Dust

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Joined
Oct 23, 2015
Messages
1,580
I know I got what you were saying.
He builds great rifles I only get to use mine once a year as Michigan is not known as a long range state. But I wanted my dream gun so I did it.
I would love to have a rifle built by one of the top builders in the country. I would already have one too, if I could just make up my mind what it would be? guess it will never happen until I come across something so cool I can't stand not to have it... Maybe a 30-06? High end shotguns are much easier to decide on...
 

Slim13

Active Member
Joined
Jun 4, 2018
Messages
37
Location
Idaho
I was raised to never head into the field
Hunting with a clean bore. Having integrated that into my hunting routine, I’m confident the only cold bore problem is me.
 

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