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#191979 - 04/16/18 05:02 PM Re: LP vs. LR primers. . .is there any advantage? [Re: cherokeetracker]
OFFSHORE
journeyman


Registered: 12/10/17
Posts: 81

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Cherokeetracker,

Thank you for your comments on this matter, it is very informative. I have loaded up 25 rounds with LR primers to test over the chrono, but Mother Nature had other plans for me today. I live in Hernando Co. Florida and temps here lately have been a nasty balmy 85/90 degrees - YUCK!!! I agree with you, I've been very impressed with the velocities I have been getting with this new 445SM barrel. . .better than what I was hoping for with accuracy to boot. The guy online whom I chat with lives in Panama City, Fl. which is a few hours NW of me, but his load is close to mine; powder,brass, but he uses a 320 Cast Performance LBT bullet and the LR primers and he has a 12" barrel while I have a 14" barrel. The VV N-120 is available from several of the big powder sellers. As soon as I wrap up the rest of my load development and if I do settle on the N-120, I plan on ordering a 8 lb. jug just so I don't run out anytime soon. I also want to run some in my Ruger Bisley Hunter 45 colt with 280 gr. hardcast for sh!t's and giggles. I will keep you guys posted on my findings regarding the LR primers in my 445SM as soon as I have time to get back out to the back pasture. Thanks again and please keep the info coming.

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#191987 - 04/17/18 09:17 AM Re: LP vs. LR primers. . .is there any advantage? [Re: OFFSHORE]
cherokeetracker
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Registered: 11/27/15
Posts: 439

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OFFSHORE: I understand about Mother Nature. Yesterday the wind was the usually 16-18 MPH and I was trying to shoot pistols at my usual 50-100 yds. Even with 225-250 gr bullets they get pushed around and move sometimes 6-8" at 100yds.Especially when it gusts.
I did find the N120 and might point put that it really shines in cases like the 221 Fireball, and a few others where you have a small case and higher pressures. (think bottleneck)
When it comes to Pdog hunting it is my first choice for the smaller stuff. Clean and gives good accuracy.
As far as the N120 and it's use in the 45 Colt cartridge. Well that is up to you but,, you might as well know right now that you will not burn but about half of the powder and the velocity is certainly going to be in the lower range. I think there are better choices out there.

280,300,310, 315, 325,335, different grain cast. I have tried a lot of bullets. Hodgdon, H110 is hard to beat. Especially with the heavier bullets.
It gives me the velocities that I like or want.

That 280 gr cast opens up several possibilities as far as powders. H4227 was one that worked well with that weight. For an even milder load W231 was good.

I am going to ask what is the intended target with this combo?

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#191990 - 04/17/18 10:21 AM Re: LP vs. LR primers. . .is there any advantage? [Re: cherokeetracker]
Gregg Richter Administrator
Distinguished Expert


Registered: 01/18/04
Posts: 4031
Loc: Pine, Colorado

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It would be a data gathering experiment to choose one load using a ball powder and shoot 5 shot strings, changing only the primer. And of course shoot over a chronograph through a pressure barrel, off a Ransom rest, at a target at say 50 yards. And using every primer available, both rifle and pistol. You would get some interesting results.
_________________________
"Don't ever tell me the odds."
Hans Solo, Star Wars movie

There's more than one way to skin a coyote.

The only man smarter than a wise old coyote is the one that gets him.





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#191997 - 04/17/18 01:40 PM Re: LP vs. LR primers. . .is there any advantage? [Re: Gregg Richter]
cherokeetracker
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Registered: 11/27/15
Posts: 439

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Agree !! The key word here is the pressure barrel since without it we probably would not know about any pressure spikes that can happen. But me I would want to have at minimum 10 shot strings.
There goes my analytical thinking again... What about errors?
haaa


Sort of like a dream job for some of us.

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#192022 - 04/19/18 09:58 AM Re: LP vs. LR primers. . .is there any advantage? [Re: cherokeetracker]
jwp475
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Registered: 01/18/09
Posts: 1039

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As I posted above a John Linebaugh?s pressure testing in his pressure barrels in straight walled handgun rounds like the 475 and 500 Linebaugh?s showed an increase as higher as 10,000 PSI without a corresponding jncrease in velocity when useing rifle primers. I never use rifle primers.

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#192070 - 04/23/18 05:38 AM Re: LP vs. LR primers. . .is there any advantage? [Re: jwp475]
OFFSHORE
journeyman


Registered: 12/10/17
Posts: 81

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I managed to get out to shoot some more yesterday. . .brought out 25 loads of each; 155 LP primers and 210 LR primers. All loaded with 30 grs. VV N-120 powder and 315 gr. hardcast. Shooting over my chrono, I can say that Mr. Linebaugh is pretty spot on in his findings! Muzzle velocity did not increase, but my ES/SD and group size went to hell.

445 SM
Starline brass
315 gr. WLN-GC .431"
30.0 grs. VV N-120
Fed 210 LR primer
MV 1656 fps. ES/SD 44/17
4.5" groups @ 100 yds.

445 SM
Starline brass
315 gr. WLN-GC .431"
30.0 grs. VV N-120
Fed 155 LP primer
MV 1644 fps. ES/SD 11/4
1.5" groups @ 100 yds.

The above info is the average of each 25 shot string out of a 14" MGM T/C Encore bull barrel.

I'm contemplating taking off the Leupold DDP sight and mounting a Leupold scope on this rig. I was not expecting this barrel/myself to shoot as good as it does and now curiosity is wanting me to stretch it's legs! I feel this combination with a good scope (Vx-3 2.5-8x32) could be a 200 yard lead slinging machine!!!

I also loaded up 18 rounds of the 45 Colt with the VV N-120 and Cherokeetracker was correct. . .didn't shoot worth a damn.


Edited by OFFSHORE (04/23/18 05:41 AM)

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#192074 - 04/23/18 08:31 AM Re: LP vs. LR primers. . .is there any advantage? [Re: OFFSHORE]
Chance Weldon Administrator
Distinguished Expert


Registered: 09/20/13
Posts: 4052
Loc: Martin, Tennessee

content Online
Interesting. Never really thought it would be that significant of a difference.
_________________________
Formerly TN Lone Wolf

"We are only as strong as we are united, as weak as we are divided." - J.K. Rowling

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#192076 - 04/23/18 09:41 AM Re: LP vs. LR primers. . .is there any advantage? [Re: Chance Weldon]
s4s4u
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Registered: 01/18/04
Posts: 9608
Loc: Northern MN

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 Originally Posted By: TN Lone Wolf
Interesting. Never really thought it would be that significant of a difference.


Indeed. I guess that debate is settled.
_________________________
Rod, too.

Short cuts often lead to long recoveries.

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#192078 - 04/23/18 11:06 AM Re: LP vs. LR primers. . .is there any advantage? [Re: Chance Weldon]
jwp475
old hand


Registered: 01/18/09
Posts: 1039

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 Originally Posted By: TN Lone Wolf
Interesting. Never really thought it would be that significant of a difference.



No surprise here. Much easier to get accurate loads with LPP instead of LRP. Little difference in velocity.

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