I noticed there was no data available for the A Square with 300 grain Barnes bullets so I loaded some and chronographed them with a 35P Oehler here is what I came up with
Rifle used was a McGowen 30" barrel 15 twist
I started with 112 grains of H4198 and went to 120 grains of H4198. There were no pressure signs in this rifle
112--3175
114--3258
116--3310
118--3395
120--3479
This is a heavy rifle 17.0 pounds in a 40X stock
for shooting bears from a bench rest

YEE-HA!!!

Any of those loads accurate?

1" 5 shot groups

Thanks Ross

Good Data. I am looking at a similar project, most likely by this weekend, depending on delivery of bullets. 350 gr BBW#13 LG .510. I have a 24 inch 510 Wells to work with.

Michael

Heh heh
I have a 27"-barreled Ruger No.1 in 500A2 that is 29" in barrel projection with screw-on muzzle brake,
and weighs 12.5 pounds with quadruple-ringed Sightron 4x-16x mil-dot scope and bipod and slip-on recoil pad,
in B&C composite stock with 1:10" McGowen stainless barrel that is 1.000" at muzzle,
and is my 1000-yard plinker with 750-grain Hornady A-max bullets and H4350.

I too shall make good use of this excellent data.

Looks like H4198 is going to be a player in the 500 Mbogo Short.

If anyone is looking for a 50 cal barrel .510
McGowen has some 32" 50 cal BMG barrels that are 1.650 dia on sale. If you use pay pal to purchase one they were 125.00 If you have it contoured by someone you are getting a 50 cal barrel real cheap

This sounds interesting, I am currently running 570gr woodleighs in my .500 A2 and the 300gr pill would be good on feral pigs.

The downside of pushing these light bullets at fast speeds is penetration, they turn into varmint bullets. I tried something similar with my 450 NE. 115gr of powder behind a 300gr bullet led to some very high velocities. However, the bullet couldn't even penetrate a 6in tree. The bullets just blew up on impact. While they were a cheep alternative for plinking rounds, I would never shoot anything with them (at least at that velocity).

I did some of this yesterday with the new 350 BBW#13 NonCon LG. FYI........

I have been piddling around with this new 350 gr .510 caliber BBW#13 LG--The number is

DGBR-HP X09LG

FYI--You .510 boys are going to want these!

51 Alaskan

18 Inch Marlin I am up to 68/RL 10X for 2188 fps and 65/H-4198 for 2134 fps. These are safe and work without issue in my Marlin Guide Gun, if you blow yours up, it's on you! These do not even give a hint of pressure, and I intend to move UP. No Pressure testing equipment is running here right now, so take this and start 10% lower in your rifle!

510 Wells, big stupid looking Ruger, 12 lbs, 24 inch barrel, totally useless for man or beast!

115/H-322 gives me 3007 fps

110/RL 10X gives me 3030 fps.

This is seated deep, using Talon Tip, and works through the magazine.

Just FYI

Probably terminals next week.

Michael

quote:

Originally posted by thecanadian:
The downside of pushing these light bullets at fast speeds is penetration, they turn into varmint bullets. I tried something similar with my 450 NE. 115gr of powder behind a 300gr bullet led to some very high velocities. However, the bullet couldn't even penetrate a 6in tree. The bullets just blew up on impact. While they were a cheep alternative for plinking rounds, I would never shoot anything with them (at least at that velocity).

Not all light for caliber are varmint bullets Canadian. Many do actually quite well, but you have to know the breaking point.

With a BBW#13 NonCon, there is NO UPPER END to velocity, the more velocity they have, the deeper they go. I bet a pretty good Dollar, this 350 BBW#13 will exit buffalo most of the time. So penetration is not the issue with these. Try one of these on your 6 inch tree, and it will most likely fall over, and I guarantee there will be an exit.

Michael

Michael you think your 510 wells Ruger is stupid how about my 500 A Square. 30" 1.350 barrel with one of my 5 port brakes on it

Ross

HEH HEH...... OK, point made! Yours is a "Bench Rest" for prairie dogs and such! LOL....

Michael

quote:

Originally posted by michael458:
Not all light for caliber are varmint bullets Canadian. Many do actually quite well, but you have to know the breaking point.

With a BBW#13 NonCon, there is NO UPPER END to velocity, the more velocity they have, the deeper they go. I bet a pretty good Dollar, this 350 BBW#13 will exit buffalo most of the time. So penetration is not the issue with these. Try one of these on your 6 inch tree, and it will most likely fall over, and I guarantee there will be an exit.

Michael

Very true!! I should have clarified a little bit. I was referencing cup and core bullets, much like the OP was using in his test. I agree with you 100% that solids or a better constructed bullet would have a great deal of penetration.

Canadian

Follow this link, if you don't already know something about these NonCons, I think it will help explain some things and how they work, what they do.

http://www.b-mriflesandcartrid...ntional-Bullets.html

Michael