[67DRESDA]

Which one and why for 38 supercomp.

New to the forum,my very first post and my very first open gun.
Just an all around rookie.

Ordered a new blaster from Brazos Custom the other day and
Bob's recommendation is winchester small rifle.I have lot's of
small pistol but no small rifle and was wondering if small pistol
will work ok and if not why.

All advice will be greatly appreciated and thanks in advance.

[G-ManBart]

Welcome

You'll probably find the answer to 95% of your questions using the search function....just to save yourself some time waiting for a response.

The short answer is that with most powders you can load 38SC to Major with Win SP and not have problems, but SPM (most any brand) or SR primers are helpful. Some loads will flatten SP primers (Federal more than any others) to some degree and that often leads to shavings filling up the firing pin hole (Bob probably uses an extended FP to avoid this) or just gathering up in the lube etc. Most SR primers won't do this, so it's one less thing to worry about. I like Fed SR the best, but Win SR are fine and I'm getting ready to test Wolf SR soon. I've also had excellent results (consistent chrono numbers and good accuracy) using Fed SP Magnum primers.

Some threads with lots of info on this:

http://www.brianenos...?...t&p=1055248

http://www.brianenos...?...t&p=1068876

[hitman]

I have tried SP in my 9 Major open, no problems but why take a chance.

Use what Bob says.

That said I run SP Mag. in my open.

[67DRESDA]

G-ManBart, on Oct 7 2009, 09:15 PM, said:

Welcome

You'll probably find the answer to 95% of your questions using the search function....just to save yourself some time waiting for a response.

The short answer is that with most powders you can load 38SC to Major with Win SP and not have problems, but SPM (most any brand) or SR primers are helpful. Some loads will flatten SP primers (Federal more than any others) to some degree and that often leads to shavings filling up the firing pin hole (Bob probably uses an extended FP to avoid this) or just gathering up in the lube etc. Most SR primers won't do this, so it's one less thing to worry about. I like Fed SR the best, but Win SR are fine and I'm getting ready to test Wolf SR soon. I've also had excellent results (consistent chrono numbers and good accuracy) using Fed SP Magnum primers.

Some threads with lots of info on this:

http://www.brianenos...?...t&p=1055248

http://www.brianenos...?...t&p=1068876

Thanks for the tip and information G-ManBart.
Very good info and exactly what I was hoping to here since I have a fairly good stock of Federal SPM
and CCI SPM on hand .
Thanks again

[XRe]

Which load are you going to run? I have a very small stock of WSRs, so I picked up what I could for practice purposes- WSPMs. They are definitely softer than WSRs, but with the N105 load I'm running, they still look quite reasonable. I loaded some WSPs for giggles - they're slightly flatter than WSPMs, but still usable in a pinch. This same load leaves WSRs looking pristine (minus the firing pin strike, of course). So, in my load, I feel I can use WSPMs without issue. I haven't chrono'ed them, yet, so I have no idea if/how they affect my load vs. WSRs. WSPs tended to shave just a hair on occasion, so I'd think they might be just a tad on the soft side for my liking.

[calishootr]

Back in the day when we were still tryin to make major w 231 and 160 gr lead bullets in single stack guns (pachmayr made a goodly sum of money off us w/ his steel lined grip panels) because of blown cases, we tried all kinds ofthings, thiswas waaay before anyone thought of the extended firing pins andthe like, we were toldthat ifyou used small rifle primers they wouldcontain the pressure, and the primer flow issue would be negated, time passed, loads changed, gun parts changed, am now running 115gr jhps using an extended pin and small pistol primers w/ no probs whatso ever.... research and learn and see what works for your particular set up

[67DRESDA]

Lot's of good info here guys, I am learning a lot and I certainly appreciate it.

I have been shooting production for a little over a year now and am
having lots of fun with it but the open bug has bitten real hard and
I just have to give it a shot.

I will most definitely round up some sr primers but I have a fairly good
supply of sp and spm primers that i was wanting to use.Looks like
maybe I will be able to squeak by with the spm for a while.

For optimal performance,recommendations that have been made
to me are as follows:
OAL:1.235
Powder-10.0 grains of VV N105 or 8.6 grains of IMR 4756
I would also like to try some Trueblue.Do any of you guys
load with Trueblue and if so how well does it work for you.

Thanks

[Neomet]

Projectile weight?

[G-ManBart]

67DRESDA, on Oct 8 2009, 09:47 PM, said:

For optimal performance,recommendations that have been made
to me are as follows:
OAL:1.235
Powder-10.0 grains of VV N105 or 8.6 grains of IMR 4756
I would also like to try some Trueblue.Do any of you guys
load with Trueblue and if so how well does it work for you.

Thanks

Everyone is different, but everybody that I've let try my N105 loads has switched to a similar combo tuned for their gun. Using either 4756 or N105 (or 3N38) you will almost certainly be just fine with SPM's.

4756 is a good choice, but if you like it, buy a bunch because the lot to lot variation is pretty dramatic. The older lots of N105 (probably won't find any of them since all the available N105 was bought up about a year ago during a shortage) were a bit faster than the current lots, but the current lots (2007 and 2008 are all I have) seem to be close enough to one another I haven't had to change my charge weight.

[G-ManBart]

Neomet, on Oct 8 2009, 09:58 PM, said:

Projectile weight?

That looks like a 124/5 powder charge. With a 115gr MG JHP I'm running 10.5gr and getting 173-175PF easy. R,

[Neomet]

Thats kinda what I was thinking. I'm working up a 4756 load with 121s now. Tried 8.0 just for a baseline and was at 156. I'm betting about another .5 to .7 should get me there.

[67DRESDA]

G-ManBart you are right on with the weights.
125 grain Zero JHP or 124 grain Montana Gold
with a pf in the range of 168 to 170.This is also
with the wsrp that I will have to substitute with
fspmp for now.I will just start off a few grains
lower and work my way up.

[al503]

In my 5" Brazos, I'm getting right around 168 with 9.7 of n105 with a 125 zero loaded to 1.245". I would start right around 9.5 and work up.

8.4 of 4756 got me 167.4.

9.5 of 3n38 got me 165.4 and HUGE fireballs.

9.5 of SP2 got me 169 pf.

True blue will work just fine but it is much dirtier than the two above. I'd start at right around 8.2 grains or so.

Favorite load is the 4756 followed by the SP2. Both are soft loads and the dot tracks the best.

[hitman]

124 MG JHP, 7.7 Silhuette, WSPM, OVL is something like 1.169 this gets me a 170 PF

Was running HS6 @ 7.9 for 170 pf.

This post has been edited by hitman: 09 October 2009 - 04:44 AM

[67DRESDA]

67DRESDA, on Oct 8 2009, 09:43 PM, said:

G-ManBart you are right on with the weights.
125 grain Zero JHP or 124 grain Montana Gold
with a pf in the range of 168 to 170.This is also
with the wsrp that I will have to substitute with
fspmp for now.I will just start off a few grains
lower and work my way up.

I think that I should correct myself,I Should have
said a few tenths of a grain lower.

[Neomet]

8.6 4756
121 IFP
WSP

169.3 Really like the feel and dot movement.

92 degrees
8% humidity

I still have about 4k of WSPs before I go to Wolf SRs but I will update this then.

[Albertl35]

I have a Brazos Pro Sx and get the following chrono results:

Bullet: Zero 125 JHP
Brass: New Starline
Primer: WSR
OAL: 1.235
Powder: 4756
Charge: 8.9gr
PF: 170

This post has been edited by Albertl35: 30 October 2009 - 09:33 AM

[RH45]

I keep some 4756 around, just in case I run out of VV N-350, but, it's dirty stuff!

I tried some 105, but, I didn't think it felt any different than the 350, and it made the case REALLY full.