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Thanks for the reply. I follow F-Class guys like Erik Cortina and he says he cleans his gun between every event which is usually 20 - 40 rounds. So perhaps he has found the node in a spotless barrel. The PRB guys on the other hand don't clean their guns for many hundreds of rounds. I am...

I had an interesting result after deep cleaning my (2) 6.5x284 benchrest guns, both have Krieger barrels. Looking at the barrels with a borescope I could see some baked in carbon that was being very stubborn and didn't want to come out. The guns were shooting .20 to ,25 MOA so I was happy...

Since I have hung out on this forum for many years and gained lots of knowledge, I thought I'd throw this out to you guys first. I am offering my Grizzly G4003G with DRO Pro EL400 DRO to the first person to bring $1000 cash to Louisville, KY and pick it up. The lathe is at driveway level in...

thx

I was in the process of truing up the bolt lugs on a Remington 700 action. The action had been sent to a well known gunsmith for accurizing. I checked the rear lug contact to make sure both lugs were touching. I discovered that only small part of one lug was in contact (~10%). I also...

Mike, thank you for helping us out!

Some of you guys may be familiar with a video put out by Grizzly's benchrest gunsmith called "Chambering a Championship Match Barrel". In this video, he goes step by step through all the steps he uses to chamber a barrel and then install it. In this video (Chapter 23, about 54:00 minutes)...

I just mounted a Nightforce Scope on my Remington Sendero 700 Action. Nightforce 20MOA base and Nightforce rings. Scope is NF 5.5-22x56 and has 60MOA of windage adjustment (100MOA Elev). When I zero'd the gun at 100yd, no wind, the scope is not centered for windage. With the impacts...

I purchased a Denver Instruments MXX-123 high precision scale after seeing the reviews on 6mmBR.com. I just wanted to report that my MXX-123 has turned out to be pretty much junk. I started getting underload errors on startup and now I have to place about 180 grains of weight on the scale to...

Thanks for the replies. From an engineering standpoint, I was thinking that there was some minimum amount of shoulder contact because of the rearward shear forces when the round fired. A 1.250" shank would have 1/16" contact all the way around the barrel circumference with the BAT M action...

Minimum Shoulder height Thanks for the replies. alinwa, you and I are on the same wavelength. I will have to ask around about recoil lugs and possibly a 1.450" shank. Supposedly it is not that big a deal to order a 1.350" or 1.450" shank and a straight taper to whatever barrel length and...

I'm still learning to chamber my own barrels so please be gentle. I have a BAT M action (1.125" x 16tpi) I would like to chamber a .338 Lapua Magnum in a 30" Heavy Varmint contour. I prefer Kriegers and Bartlein barrels but the barrel manufacturers only list shanks of 1.250" in that contour...

Thanks for the reply, I just got back from the range this morning. I shot several 5 shot groups with bullets having the same bearing surface reading. (7mmSTW, 76.5gr Retumbo, GM215M, .012" neck, .001" tension, JLK 180gr VLD, 3019fps, Krieger .310neck, 1-8.5 30"HB) Amazingly, my ES dropped to...

I sorted a large group of bullets using a bearing surface comparator. I cam up with three main groups. So, if I decide to seat the bullets .010" into the lands, do I need to adjust my bullet seating die for each bearing surface group? If I don't I will be +/- .010" into the lands using the...

I just had the exact issue as Donald stated. I had a Sendero barrel that would "walk" from target center to 9 o'clock @ 2" at 200yards as the barrel heated up. Once the barrel was warm, the group would stabilize at about 1 " at 200 yards. Very aggravating, I'm replacing the thin factory...

cuz, thanks for the reply. Wind was calm, all flags were laying flat so that wasn't an issue.

As if I wasn't having velocity variation issues with my Haevy Gun, my factory Remington 7mmRM Sendero decides it want to act up too. I finally found a consistent load that shoots amazingly well in this factory gun. 70.2 H1000, GM210M, 168SMK's, .020" off the lands. The strange thing is the...

I am having an issue with my Heavy Benchrest gun that has me scratching my head. It is a BAT action, Krieger, McMillan 7mmSTW. The gun is shooting great and I finally found a bullet that it likes but I am getting very large velocity variations with my load. The load is 78.2gr Retumbo...

There is a fantastic Ballistics App for the iPhone/iTouch now called Ballistics FTE (Field Tactical Edition) This app is loaded with everything you can think of and is extremely useful for long range shooters. http://ballistic.zdziarski.com/ I don't have any affiliation with the author but am...

I currently have a BAT Model M action for my 7mmSTW HG. The specs on the action are: 8 ½ Bat Round Action with Big lugs, 1 1/8 Barrel Pinion (Right hand bolt, Right hand loading). The bolt face is a 532 with extractor. My question is, if I decide to change to a .338 Lapua, I see on the...