I have built this but am a little scared to use it lol A mate has a worn out 308 barrel we will do some experimatation with before I try a good barrel... https://farm5.staticflickr.com/4893/31779132697_0771b5ce97_c.jpg Barrel Ultrasonic Tank by James Elphick , on Flickr Do you drive the transducers...

Now you really have got me curious! I did borescope a T3 Supervarmint in 308 win and it actually looked pretty good. I was however, horrified when I scoped a '76 vintage 12 groove Brno Model 2! The thing does shoot well, proving looks can be deceiving.

Longranger, the pictured T3 is a 1/8 twist 223. The throat has plenty of length for the heavies. With no load development and PMC brass I was getting about 1/2 moa waterline with 75gr amax using a Harris bipod on a concrete bench the other day. Nice. I have a .223 T3 Tikka Supervarmint which has 1 ...

The Inch is rear locking. This is not a handicap in any way, mine works well. The CG Inch has a robust tenon design which you could nearly hang an Abrams tank barrel off! The T3 action in stainless is light but rigid for a hunting action. I figure for an F Standard rifle it may work really well. Tha...

How do these actions perform with say a 30" Bartlein custom barrel and a suitable stock?

The standard rifles are exceptional. Has anyone done an F class build on one of these actions? I know there is some compromise with a magazine in terms of action rigidity but they appear well made.

The smaller the fire hole equals less pressure on the primer How does that work? I take it that a smaller flash hole reduces brisance which in turn changes the shot start and pressure rise profile. The pressure in the case and pressure acting on the primer in a given case would be same, regardless ...

https://rover.ebay.com/rover/0/0/0?mpre ... 3151318468

These would probably do the job.

I have found the same thing. Faster powders = less recoil and better tracking.

Although not a 7mm SAUM, I did an interesting comparison with 2 308 barrels at a 2000 round count. The barrels were one serial number apart, same profile, twist, finished length, crown and chamber. Both were loaded to the same velocity using the same cases and projectiles but with different powders....

BRETT B wrote:42 grains of AR2208 would seem RED HOT load to me !!

About 6 grains over max in a Creedmoor

Update. The website is up again.

I notice their website is unavailable. Are they still trading?

the priority seems to be lead free status. the question is does the aluminium turn into an oxide. aluminium oxide is a seriously good abrasive. then there is longevity, reliability etc. keep safe, bruce. That is a good point. The primers currently in common use can contain crushed glass which would...

Probably the best solvent (if you can call it that) for ease of carbon removal I have found is Evinrude/Johnson engine tuner. Used regularly (best straight after a shoot) it seems pretty effective. It can be left in the bore between weekly shoots but I wet patch then dry patch prior to shooting. Bor...