shovel80 wrote on Jun 3^rd, 2015 at 9:30pm:


Blowtubing introduces moisture into the fouling that is being allowed to remain.   It controls the amount of fouling that is present for the next shot by keeping it soft so the next shot can clear it out.   Basically, they are controlling the amount of fouling that builds up.   If they didn't keep it moist, the harder dry deposits would catch and hold more fouling instead of being blown out.   

Blowtubing is controlling the amount of fouling.   In fact, the amount of blows between shots is another level of control.  It's a response to the amount of fouling that is there.    

Wiping between shots is controlling the amount of fouling.  The amount is none.   Not wiping is controlling in the same way only the amount allowed is one shot's worth.  The number of blows controls how much fouling and how hard it is for the next shot and allows not wiping.

On damp days, fewer blows, etc.   

As for smokeless benchrest, there are plenty of shooters who don't "wipe" between shots but definitely clean during the match.   

semantics?

Boats,  I'm in the process of doing the same,  I have a bunch of 4759, but in an ill advised move sold off both my B&M measures some time ago when I was still shooting 22f as part of my "learning program"   I have 4 or 5 Reddings and have not been able to get consistently accurate "throws" from them with it, so I'm switching to 4227.   If/when I get another B/M Ill go back to using the 4759 in my euro-schuetzens with the stop ring fixed ammo for my offhand shooting.

I've found the clean/dirty discussion interesting and informative.   so far I hear several applications,  one being our 200 yd ASSRA competition where it might matter in precision bench rest, and in offhand where because of all the shooter induced variables it might be immaterial; and in the BPCR side of singleshotdom where "dirt control" is a highly significant factor.  Initially I was not really thinking of BP usage but the discussion is relevant and welcome.

I'd like to toss another into the mix and that is clean/dirty with the 22rfs in ASSRA match context.  The consensus in some of the ultra precision 22rf  Bench rest competition is that a stripped clean-ht-the-bare-metal bore absolutely requires "seasoning" with ironed-on bullet lube by firing x-number of rounds to achieve accuracy.  The majority of the serious rimfire shooters in the ASSRA matches may wipe the bore with a dry patch between relays or at the end of a days shooting--or if they believe accuracy is falling off in a manner not attributable to obvious reasons.   unless changing ammo brands a thorough cleaning may not be done until the end of the season and some who always use the same brand of ammo/lube may NEVER clean to bare metal.  Others of course are almost obsessive about cleaning at the end of every day---the top 22f shooters include members of both schools.

I was at the range today, just to get a reading on a .40-65 load,  19. grains  of  brand new SR4759 with a 412gr bullet.  Not a crumb of residue.    graphed at  1220 ft/sec.   Just  carbon fouling on the patch.    I think the advocates of  pressure and  quantity are right.