Talking about lube

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  • Last Post 30 April 2019
tony1960 posted this 29 April 2019

So I had the lubesizer out on the weekend and thinking of giving it a workout, or at least scrape the 20 year old lube out of it and start again. With half a block of a lube that Paco Kelly gave me back in the 80's that I used to chisel pieces off to put in the lubesizer and it's interesting getting it out when the weather has cooled. I got to thinking/wondering about what accuracy differential is there between lubes, or more so "the barrel" when different lubes are shot down it without cleaning the old stuff out.

Now a long time ago when I used to machine rest my pistol loads I noticed that I had to clean the barrel well before putting a new load down with a different lube. It seemed that the barrel had to settle down between lubes, almost one lube in, one lube out before I could consider the group to be true.

Although only testing over 50 yards, and having the group size noticably different I would assume the implications of two or three times that distance would be dramatic on group size. Until the old lube has replaced with the new lube.

I know now that if I use a PC'd projectile and then shoot a group with cast/lubed projectiles the group sizes are chalk and cheese.

So am I blowing wind or has everyone known this and it's well documented and I've missed the boat.

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Ross Smith posted this 29 April 2019

Good question, I just use one lube for everything, carnuba red.

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Ken Campbell Iowa posted this 29 April 2019

in our akrit 22lr match barrels, we noticed that if you change brands of match ammo, some would shoot good without cleaning, and some would not ....  we think it was the lubes fighting .....  

the goal was to find cheaper ammo to " warm up/condition - 20 shots --  " the barrel before the scoring shots began.

i might mention that we had to shoot about every 30 seconds once the barrel stabilized .... ? the lube fighting itself ? ....   if we had to wait longer we shot one or two into the backstop before the scoring shot.

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i have mentioned before that when trying straight k-mart lithium grease, if i waited 15 minutes between groups, the first shot would go WAY WAY >10 moa? out of the group.  the next shots grouped great if you kept going.

so after 60 years of shooting cast, my conclusions are:    GEE!    REALLY !!    WOW! .... HOWABOUTHAT !! 

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probably what makes it still fun.   ken

 

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tony1960 posted this 30 April 2019

Your right on the money Ken with the 22lr match barrels. My wife shoots a Morini and when I was testing ammo to see what shoots best, some of the results were surprising until I scrubbed the barrel and started again. I was getting 50mm+ groups at 25metres from ammo like RWS or Lapua after shooting 9 or 10 mm groups with CCI Standard (for 5 shots) so I can't see it being any different with cast and rifles. Even my BP revolver when I was testing showed "lube fighting" as you put it.

So as a point, if we do change lubes, for differing weather conditions, what is the best method of swapping out lubes in the barrel, or is it not that much of an impost?

Some places may never need to change lube, were I am is failry constant temp all year round, slight increase during summer but other than that an even temp. Jeff in NZ may be close also, depending on what time of year or where he hunts. The only ice I see is the block which falls gracefully into my scotch.

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Ross Smith posted this 30 April 2019

When shooting for what I call groups, if I wipe with ed red my next is a flier, If I wipe with hoppes, my next is a flier, if I wipe with a dry patch my next is a flier. But all 3 seem to remove the powder-lube residue. Not really cleaning, just 1-2 patches to tidy things up. My point being, why not wipe when changing lubes or ammo?

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JeffinNZ posted this 30 April 2019

"Some places may never need to change lube, were I am is failry constant temp all year round, slight increase during summer but other than that an even temp. Jeff in NZ may be close also, depending on what time of year or where he hunts. The only ice I see is the block which falls gracefully into my scotch."

Quite probably. We have a fairly tight temp range here. Freezing to 85 generally.

Cheers from New Zealand

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