39SBK vs 32Vmax FPS results

Share information about reloading the 204 Ruger.
bdweis73
New Member
Posts: 16
Joined: Thu Mar 29, 2012 2:36 pm
.204 Ruger Guns: Rem 700 SPS, Savage 12 FV-S
Location: Springfield Oregon

39SBK vs 32Vmax FPS results

Post by bdweis73 »

I finally ran some loads through a chrono, it was interesting according to it 39 SBK's with 24.9 grains of RE 10X, Win Brass and Rem 7 1/2 br primer 10 shot string averaged 3928 Fps out a of 26" barrel savage rifle, and a Remington 26" barrel shooting 32 Vmax with 25.1 grains of RE 10X win brass, and cci 450 primers I got a 10 shot string average of 3807 FPS. Thats a 121 FPS difference with a heavier bullet and and a smaller powder charge. Granted its 2 different rifles and primers, but the 39 grain SBKs at 3900 fps with only 24.9 grains really surpised me I would have guessed around 3700 fps originally, it seemed like hi numbers, but fired a 243 wssm with known numbers and chrono seemed correct. oh ya no pressure signs either Anyone elses thoughts?
User avatar
Rick in Oregon
Moderator
Posts: 4942
Joined: Thu Dec 01, 2005 4:20 pm
.204 Ruger Guns: Sako 75V, Cooper MTV, Kimber 84M, Cust M700 11 Twist
Location: High Desert of Central Oregon
Contact:

Re: 39SBK vs 32Vmax FPS results

Post by Rick in Oregon »

That just proves that every rifle is a rule unto itself.

Different internal dim's, different degree of barrel resistence, bearing surfaces, components, etc. When I sent my Cooper M21 MTV in 204 back to the factory to have the barrel trimmed from 26" to my more favored 24", I actually GAINED velocity with both the 32's and the 39's....go figure. :chin:
Semper Fortis
Rick in Oregon
NRA Life/OHA/VHA/VVA

Oregon, East of the Cascades - Where Common Sense Still Prevails

Image
bdweis73
New Member
Posts: 16
Joined: Thu Mar 29, 2012 2:36 pm
.204 Ruger Guns: Rem 700 SPS, Savage 12 FV-S
Location: Springfield Oregon

Re: 39SBK vs 32Vmax FPS results

Post by bdweis73 »

Ya I'm still scratching my head on it. Also fired case necks on one rifle are coming out at .275 and the other is at .230 wich I understand is normal they both have factory tubes, one is getting replaced after this season think it will be better off as a tent stake as I have never have gotten it to shoot less than an inch. But I have one that I just did personal best 5 shot group with a .4410 at 100 yards.
User avatar
247sniper
Senior Member
Posts: 166
Joined: Sun Jul 24, 2011 1:26 am
.204 Ruger Guns: Custom .204 Ruger !

Re: 39SBK vs 32Vmax FPS results

Post by 247sniper »

My .204 = 25.4 grains of R10 and 39SBK's gives a average of 3707 fps.
User avatar
DoubleUp
Senior Member
Posts: 146
Joined: Tue Dec 21, 2010 5:36 pm
.204 Ruger Guns: 204 Ruger

Re: 39SBK vs 32Vmax FPS results

Post by DoubleUp »

Haven't shot RE-10x in a while but my records show 3,725 ave. fps with 39 sbk's, using Win Brass and load of 25.3 gr. out of a 22" barrel Savage with 1x12 twist. Group averages came out to just over .6.
broper
Senior Member
Posts: 318
Joined: Tue Jan 06, 2009 4:12 pm
.204 Ruger Guns: Remington 700 sps
Location: Parma, Idaho

Re: 39SBK vs 32Vmax FPS results

Post by broper »

From what I've been told, when you shorten a barrel, add flutes or change the structure in any other way it changes the harmonics. Sometimes for the good, sometimes for the bad. If you have a barrel that is already shooting good, be careful about changing it in any way.
chuckhunter2
New Member
Posts: 19
Joined: Mon Mar 01, 2010 6:15 pm
.204 Ruger Guns: T/C Encore, Cooper Varmint
Location: upstate, NY

Re: 39SBK vs 32Vmax FPS results

Post by chuckhunter2 »

Broper: I agree. Years ago, I had an extremely accurate .222 LV benchrest rifle that was easily capable of winning any match. I sold it to a friend and he wanted a heavier scope so he had an inch cut off the barrel. It destroyed the harmonics and the accuracy was gone.

Tom
broper
Senior Member
Posts: 318
Joined: Tue Jan 06, 2009 4:12 pm
.204 Ruger Guns: Remington 700 sps
Location: Parma, Idaho

Re: 39SBK vs 32Vmax FPS results

Post by broper »

I have a very accurate Rem. VLS and I was thinking about having the barrel fluted. Two different gunsmiths said they wouldn't guarantee that the accuracy wouldn't change after fluting.
User avatar
Tokimini
Senior Member
Posts: 428
Joined: Wed Dec 08, 2010 8:21 am
.204 Ruger Guns: Remington 700 SPS with a Shilen barrel
Location: Victor, NY

Re: 39SBK vs 32Vmax FPS results

Post by Tokimini »

Broper, check out the FAQ sections of Shilen's website before you get the barrel fluted. They will not flute a barrel and will void your warrenty if you have a Shilen barrel fluted. They say it creates unrecoverable stresses in the barrel.
User avatar
Malazan
Senior Member
Posts: 119
Joined: Thu Apr 15, 2010 6:07 pm
.204 Ruger Guns: Cooper .204
Location: CO

Re: 39SBK vs 32Vmax FPS results

Post by Malazan »

I shoot 3931 FPS with 39 SBK's
Image

Live Hard

"When the Government fears the People there is Liberty, When the People fear the Government, there is Tyranny." - Thomas Jefferson
Post Reply