150gr Fouling/Inconsistency

Ideaman · 07-18-2006, 10:20 PM

Beyond the usual fouling seen when shooting MZ Loaders, has anyone had any unexplained problems when shooting hot loads(150gr Pydex, 260gr) over more traditional loads(80-100gr). I have had tremendous success since the main stream introduction of sabots and in-lines but on occasion, and almost always with 150gr of pellets I get rifles that start out shooting well and degrade in future sessions. These guns will have been cleaned with the Clean-patch method and appear spotless. Intensive cleaning with something like the remington bore cleaner, or more mechanical methods seem to be the remedy.

I guess some form of plastic fouling. Any ideas, experiences?

cayugad · 07-18-2006, 10:40 PM

I shot 150 grain loads only a few times in my life and decided I did not need to do that anymore. I do shoot a lot of 120 grain loads but have never noticed what you observe. Perhaps because I shoot loose powder. Normally the new sabots do not leave a lot of plastic residue in the barrel. They are not like the sabots of old. Also the lead deposits and copper that we used to see also seem to be reduced because of the reduction in the charge.

I think all you are experiencing is the general build up of fowling which is probably normal. I experience that myself. Today I was shooting a White Rifle with minimal loads and shot over 40 rounds without a decrease in accuracy. I have noticed the build up in my Black Diamond XR when I have shot a large number of rounds. It is actually necessary to pull the hammer and breech plug after say 30 rounds, and field clean the rifle.

Normally I swab between shots and do not experience too many problems until the rifle becomes really dirty and fowled. I find a good swabbing routine will prolong the shooting of the rifle. Another problem you might experience is the barrel getting hot. This can lead to a reduced accuracy level faster then the fowling I believe sometimes.

Welcome to the forum by the way....

Triple Se7en · 07-19-2006, 01:21 AM

Most every time, there is some sort of logical explanation. You haven't told us your entire ritual of howthe good evolved..... then turn bad -- so it's difficult to say what's troubling you.

Could beseveral reasons for this.

lemoyne · 07-19-2006, 08:23 AM

I have had similar problems and decieded that it was plastic fouling from the sabots so now I cleans every 20 shots with either Rem. plastic solvent or CVA sabot solvent. it seems to have eliminated the problem so far. Lee

cascadedad · 07-19-2006, 09:16 AM

The very little shooting of sabots that I have done, at least the load I was shooting, required swabbing after EVERY shot to maintain accuracy.

BS · 07-19-2006, 02:04 PM

Quote:

ORIGINAL: cascadedad

The very little shooting of sabots that I have done, at least the load I was shooting, required swabbing after EVERY shot to maintain accuracy.

I have found the same using 150 loads.

eldeguello · 07-21-2006, 07:16 AM

The bigger the powder charge, the more "burn-on at the breech of the barrel occurs. I don't know if this is your problem, but it could be. In addition, both plastic fouling, if you use sabots or any plastic on the bullet like a Power Beelt wad that can rub off in shooting, or buildup of crap like Bore Butter, can also adversely affect grouping. I'd check for these types of conditions first.

If cleaning with a solvent that dissovles plastic fouling seems to restore performance, I'd tend to think that the buildup of plastic from a sabot or Power Belt was the culprit,