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VV N-150 and Berger 200.20x

corning

What the trick/starting point to getting over 2600 fps out of a 200.20x and N-150? The VV web site seems somewhat conservative with 2388 fps with 40.3 grains. I've seen people getting 2600 to 2650. I suspect 43 grains (or more) of powder will be needed.
 
Large primer brass is good but small primer brass with CCI450s will hold b more pressure at the cost of brass life. Im hitting 2650-2700 now with a 30” 1:10 bartlein and i will likely keep my load the same for years to come with brass lasting 8-12 firings before disposal.
 
corning said:
What the trick/starting point to getting over 2600 fps out of a 200.20x and N-150? The VV web site seems somewhat conservative with 2388 fps with 40.3 grains. I've seen people getting 2600 to 2650. I suspect 43 grains (or more) of powder will be needed.
Click to expand...
The " trick" is bullet seating depth testing to expose more cartridge case capacity that you can use before you hit pressure. All VV POWDER LOAD DATA HAS TO BE FIGURED USING MAGAZINE LENGTH AMMUNITION PER THEIR POLICY. Which, because they own us is our policy also.
These bullets can be loaded to the COAL shown on the data but if you want to play with seating depth, a general rule of thumb with the Berger Elite Hunter and Hybrid Target bullets is to start your bullet seating depth testing at .015" off the lands. Then you work back into the cartridge case in .015" increments (.015",.030", .045", .060"). When you find a bullet seating depth that shows promise, you can test .005" to either side of that CBTO if you wish to see if accuracy can be improved. All bullet seating depth testing is done using the starting powder charge!

Please feel free to contact us at: Support@capstonepg.com if you have any more questions,
 
30" brux 10 tw
Lapua
Cci 450
44.4 gr n150
2645 fps

Agree with above. You may get 2 or 3 firings out of large primer brass, or around 10 out of small. Also, my bolt is a factory unbushed remington, and cci 450's are the only ones that dont blank every few shots. And even the 450's show a ton of flow into the firing pin hole, but I've never had one pop. Also, this is with a long throat chamber, 0.160 or greater, taking full advantage of the extra freebore. Would be a no go with a standard throat or seating to magazine length
 
All right Boys & Girls . I've switched to the 200gr. Berger Hybrid Target , from the 185 Target , and have been using the VV150 for several years now .
Barrel is a Brux , 1 - 10 twist , six flute , 30" , chambered to 2017 FTR spec Reamer from Manson .
Brass is Lapua SRP
Primer is Rem 7 1/2 BR
Seating Depth is .005 off of Touch . It shoots best there .
Load is 43.7gr of VV150
Interference fit is .001 . Yes ! I set my necks at .307 / .3075
Velocity runs 2655 - 2665
Average scores are 195 - 198 . X-count varies with wind and the pathetic operator .

For all those talking about only getting 10 - 12 reloads , I'm wondering what you're doing when you process your brass ? I anneal after every firing . Bump .001 , and only trim when cases get longer than 2.112". My "practice" Brass has over forty reloads on it , and I lose cases when the pockets get to big after substituting Ginex primers for the Rem 7 1/2's . I see no difference in scores , or X-count till somewhere around twenty-five reloads . Maybe "blowing out" cases has something to do with the amount of Neck interference being used ?

My Comp Brass gets treated the same way , and stops being Comp Brass when the pockets get big . Then it goes to the "Practice Box" .
 
The numbers others have shared are in the right ballpark. Pretty wide node around the 2625-2650 range, and a small fiddly node that will give you clickers if you don't have a good setup, at 2705.
 
D-4297 said:
All right Boys & Girls . I've switched to the 200gr. Berger Hybrid Target , from the 185 Target , and have been using the VV150 for several years now .
Barrel is a Brux , 1 - 10 twist , six flute , 30" , chambered to 2017 FTR spec Reamer from Manson .
Brass is Lapua SRP
Primer is Rem 7 1/2 BR
Seating Depth is .005 off of Touch . It shoots best there .
Load is 43.7gr of VV150
Interference fit is .001 . Yes ! I set my necks at .307 / .3075
Velocity runs 2655 - 2665
Average scores are 195 - 198 . X-count varies with wind and the pathetic operator .

For all those talking about only getting 10 - 12 reloads , I'm wondering what you're doing when you process your brass ? I anneal after every firing . Bump .001 , and only trim when cases get longer than 2.112". My "practice" Brass has over forty reloads on it , and I lose cases when the pockets get to big after substituting Ginex primers for the Rem 7 1/2's . I see no difference in scores , or X-count till somewhere around twenty-five reloads . Maybe "blowing out" cases has something to do with the amount of Neck interference being used ?

My Comp Brass gets treated the same way , and stops being Comp Brass when the pockets get big . Then it goes to the "Practice Box" .
Click to expand...
That's not a lot of neck tension, lol. I use a 0.306 mandrel. Literally 30 minutes ago, I screwed on a new brux which was chambered with the same manson reamer as you have. So, we'll see how it does.
The barrel I referenced before was cut with a different reamer with a fat base. The fired brass measured 0.475 at the. 200 line. I attributed that to lower primer pocket life? Hopefully the new reamer will tighten it up a bit.
On another note, I'm liking the Berger 208 hybrid @ 2615. Tuned easier than the 200.20x in the old barrel. Probably tunes similar to the 200 hybrid, but has a bit better drift
 
Having the FTR team chamber, I have tried 44.5 Varget, but not VV powders. Some use H4350 in these isles, N150 more popular in Aussie, I gather. Works best 25thou off in mine - although I prefer the 185's
 
corning said:
What the trick/starting point to getting over 2600 fps out of a 200.20x and N-150? The VV web site seems somewhat conservative with 2388 fps with 40.3 grains. I've seen people getting 2600 to 2650. I suspect 43 grains (or more) of powder will be needed.
Click to expand...
Just a FYI, you may need to load with a drop tube to get to 2650 fps with N-150. Not a must by any means but using one about 12 inches long makes things much easier.
 
LVLAaron said:
Yes, but also no.
Click to expand...
How do mean? These are both 200gr Hybrid bullets. Yes, one may be longer than the other. BUT they are both the same weight and design. The bullet seating depth may be different for each THAT may AFFECT THE POWDER CHARGE. but the load data is the same for both bullets.
 
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