308WIN, 185gr Juggs, and CCI 450 for F-Class

[Salukiwildcat]

Have been shooting the same for many years now.

2013 FTR Team reamer in 30" Brux on Pierce action
Lapua brass - 15+- firings
CCI 450 or BR
185 J - .030"+- jump
N150 - 45.9 gr currently
2850 fps at the moment, with 1900+ rounds. It started at around 2800 fps, but keeps getting faster. Thorro-Clean will slow it down temporarily, but by the end of a match, it is back to 2850.

Lane

Fellow F-TR shooter here - can you elaborate on your Thorro-Clean theory? I've noticed some intermittently slower speeds with my match load (Varget/205M/200.20X) as of late, and I clean after every match with Thorro-Clean. You've got my attention.

 

[LVLAaron]

Fellow F-TR shooter here - can you elaborate on your Thorro-Clean theory? I've noticed some intermittently slower speeds with my match load (Varget/205M/200.20X) as of late, and I clean after every match with Thorro-Clean. You've got my attention.

Clean bright steel is sticky. Fouling is lubrication.

 

[brentwoodkris]

Have you tried CFE-223 ?
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I develop loads for people who don't have all the equipment or who have moved and havent set up their equipment yet etc
anyway, a friend of mine has a custom 308 and wanted me to develop a long range tack driving load
using 180 WTC Flatline bullets
But his back up bullet is 185 Juggernauts
I would have thought CFE-223 to be too hot of powder myself
But after some research of what other guys were using mine landed within 20 fps of the High Node of other peoples loads
47.0 grns of CFE-223 180 gr Bullet / approx 2800 fps
It basically turns a 308 into the equivalent of a 30/06
Tack Driver at 900 yds
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This was with LR Primer Brass though, but may still be relevant.

Honestly I hadn't even considered cfe223 as a contender!

 

[brentwoodkris]

Have been shooting the same for many years now.

2013 FTR Team reamer in 30" Brux on Pierce action
Lapua brass - 15+- firings
CCI 450 or BR
185 J - .030"+- jump
N150 - 45.9 gr currently
2850 fps at the moment, with 1900+ rounds. It started at around 2800 fps, but keeps getting faster. Thorro-Clean will slow it down temporarily, but by the end of a match, it is back to 2850.

Lane

This is very helpful info, thanks so much!

 

[Ahhnother8]

Fellow F-TR shooter here - can you elaborate on your Thorro-Clean theory? I've noticed some intermittently slower speeds with my match load (Varget/205M/200.20X) as of late, and I clean after every match with Thorro-Clean. You've got my attention.

Thorro-Clean polishes the bore, so there is less friction to build pressure, particularly if not entirely, in the first few inches of the barrel. We have the opportunity to shoot a LOT, so I tested some cleaning theories. The first shot out after thorro-clean is typically about 80 fps slow and hits about 1 1/2 MOA low. Then it takes a number of shots to properly foul and settle the barrel before going for record. It is a waste of time, components and barrel life getting it that clean. I also shoot a Dasher and have seen the same thing. Also shoot some 6PPC and don't clean the entire day of the BR match. Heresy? Maybe. But it works for me.

 

[TxBowHunter409]

N140 is a tick faster than varget, N150 is a tick faster than varget. I used to shoot N140 with the 185 @2735 ish, 30" 0.160 fb. N150 tends to be better with 200/208 gr.

Well damn.. I just finished loading up a ladder test using N150 and some 150 grains. Wish I would have seen this earlier. Have both 190's and 200's sitting on the shelf. I ain't going back and redoing at this point. We'll see how they shoot.

 

[Jeff Porter]

Clean bright steel is sticky. Fouling is lubrication.

I think you have it backwards. Less friction , less pressure builds in the barrel, lower velo in clean cold bore. Little fouling, more resistance and the pressures raise and settle for higher velocity.

 

[DHD]

N140 is a tick faster than varget, N150 is a tick faster than varget. I used to shoot N140 with the 185 @2735 ish, 30" 0.160 fb. N150 tends to be better with 200/208 gr.

Did you mean N140 is a tick faster than Varget, and N150 is a tick slower than Varget? Not having used N150, I always thought it was on the slower side of Varget, kind of between Varget and H4350.

 

[Codyway]

Did you mean N140 is a tick faster than Varget, and N150 is a tick slower than Varget? Not having used N150, I always thought it was on the slower side of Varget, kind of between Varget and H4350.

Yes, sorry for the mistake. It's my understanding that n140 is faster than varget, n150 is slower. But they're all very close.