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Sounds like WSSM to me.. I hope you're making brass -before ordering the reamer. Very thick brass has more springback variance, all else equal. This produces tension variance, and higher ES. Also, stress relieving brass so thick(with a torch) could be tricky and actually increase variance if...

Is your Shehane MBR tracker fully inletted for a particular action? If not, you might as well use any action you like.

Not as measured on a Sinclair Boyd..

Sounds like a great match format to me, and it sounds like you're gonna be prepared. I wasn't really thinking a 'bad' scope. More like the difference in dialing out parallax from long ranges to short. It may just be a crazy notion, but it seems very easy to accept a parallax setting up close...

You said that you don't usually shoot so far out. Are you using a different scope on this distance gun -vs- the known 100yd groupers? I wonder if parallax is taken out at 100yds -as accurately as 500yds.. It is easier to lock into 'parallax free' at 500 I wonder, because I have always shot...

Don't ever overlook both sides of a blade.. Walmart brags on Wall Street about being 95%+ chinese. Have you forgotten these are a communist enemy of ours? Or that Indonesia represents the largest muslim population? Have you forgotten that Farley has provided coax rests for American BR shooters...

3 things; The bags look too close to metal to meet IBS rules(I think it's 1/2"). The rest top doesn't look like it rotates to provide unbinding recoil on off-aligned front to rear to target setup. Are there going to be handles for it? How do we pick it up from a case and set it down properly...

Don't underestimate the BOSS Fred. It's as good as any other built to date. And likely better than most... Read Browning's patent sometime

I have seen bolt turn position as a factor here, even with some of my custom actions. Watch your bolt handle on dry firing. Does it jump up or down? If so, it's a random injection of pretty evil energy[That's what she said]. Always surprised me that bolt closure doesn't click into a detented &...

Yeah Mark, provided the barrel is allowed to cool between each of the 3-5shts. Otherwise, it's just group shooting -without sighters.

Wayne, 'accuracy' here means tight grouping. Big departure from what you need in a hunting gun.. Actual accuracy is taken to center of mark, and defined in MOA. Cold barrel accuracy is taken to center of mark with single cold barrel shots. Cold clean barrel accuracy is taken to center of mark...

Excellent points Ken. And my basis for exclusion of cooper as a custom I guess is that I'm not seeing a 'custom' as merely having appearance options -in benchrest. As you suggest, a benchrest 'custom' is a completely different animal. Whole nother level of purpose built performance. But IMO...

It all circles back to the differences between 'concentric' and 'straight'. Concentric is taken only to a centerline. Runout includes everything. There are ways to 'center' ammo on a tool which may or may not apply to your chambering. This in my view is where straight ammo is a better endeavor...

VaniB, your in a perfect position to see that low runout as measured on the Sinclair is also 'concentric', where concentric as measured on the Hornady can have any runout in the world. Straight ammo isn't until it measures so on the Sinclair. Also, don't assume runout as 1/2 TIR on loaded...

Is a Farley right handed? WOW

That is too hillary anus! :)

Yeah, I think you got it covered, provided you only use reticle hold-off for elevation correction. Now just make sure your gun actually shoots plumb at various ranges to longest. For long ranges you may need spindrift compensation via cant, and don't forget to account for coriolis with the...

My Wilson's seat to the correct depth. Most are also chambered Wilson blanks, with micrometer tops. But not all. I just don't see how bullets could be seated better than with Wilsons. I also completely agree about the majority source of runout coming from sizing.

GT40, your slope angle is fine I'm sure. But as far as cant, it's iffy. What you've matched so far is the rail to the ASL.. It could turn out fine, but you'll need to shoot a plumb line, with the gun at 'shooting level', full range of scope adjustment to confirm it. With this you might need to...

GT40, what you're considering IS a flaw with that unit's design. Both the assumed level, and the obvious glare concealing it. Whatever level used must be adjustable, so that you can shoot a plumb line full range of elevation adjustment. It also needs to be clearly visible from shooting position...