newman1

i want to try a new load...50 cal. 300 grain Dead Center with 120 grains of ffg 777.the gun is a remington 700 mls.does anybody think this is a bad idea?as far as pressure goes.thanks guys

rick_reno

What are the signs of too much pressure in a MZ rifle? I know what to look for a cartridge gun (dificult case extraction, primer strangeness, head stamps flatened, etc). Do you know you're using too much powder when accuracy gets erratic?

newman1

rick_reno what i guess i am trying to say is that i do not want my barrel to rupture or anything like that.i do know that when accuracy starts to suffer you are using to much powder,but i have not shot this losd yet,just looking for some feedback from some of these smart fellas in here before i do something stupid..

Tahquamenon

I would consider 120gr T7 loose in a Rem700 a MAX Load.
Good way to tell if you are pushing things too hard for the barrel is your accuracy will go out the window with higher charges as a result of blow-by. Also, the higher charge can cause the sabot or projectile to "skip" over the rifling.

I'd suggest starting with 80-90gr and work up to 120gr and see where things shoot the best.
In my Rem700, I found a very accurate and effective deer load with 105gr T7 under a 300gr Hornady XTP. Killed many deer with this setup.

Let us know your results!

BDHUNTR

newman, I do not have a lot of experience with T7, but 120-grains of Pyrodex is definitely safe in a Remington, per the Model 700 ML/MLS manual. I do not believe that Big Green has ever actually recommended 150-grain loads in Reminton muzzleloaders, but I remember reading somewhere that 150-grain loads were safe. I think this is due to the fact that the Rem 700 ML's were manufactured before the advent of 150-grain pelletized charges, so the normal max load for black/Pyrodex was 120-grains in most muzzleloaders.

I think they can handle 150-grain loads. In fact, I know it can handle a 200-grain load, at least one. In a stupid move, I once dropped two, 50-grain pellets down the bore, went to help a friend with his rifle, dropped two more on top of the first load and seated a 295-grain Powerbelt A/T on top. When it went off, it blew me back off the bench. A thorough check of the entire rifle showed no damage. I believe all muzzleloaders are loaded way over max during the test phase, just to ensure they are built strongly. But, to answer your question, Remington says 120-grain loads are fine

[link]http://www.remington.com/pdfs/om/om_700ml.pdf[/link]

Check out the link for more info.

Brian

newman1

BDHUNTER i called big green a couple of weeks ago and talked to a nice young lady and she informed me that the mls was 150 grain capable.the way i figure it is that 120 gr. 777 is close to 150 gr. of blackpowder.what i am not sure is that if your gun is rated for 150 grains,does it matter how heavy of a bullt you use??????????

cayugad

120 grains of loose Triple Se7en and that projectile like already stated... I would consider that a max load. You will know when you fire it and check the accuracy. As for the projectile, if any of them will hold with that kind of power behind them that dead center 300 grain will. I shot them in my Black Diamond XR with 120 grains of Pyrodex and the accuracy was excellent. That would be a real long range load in my opinion.

Be sure and keep an eye on your breech plug for seizing.....

Read your owners manual. Many times they place a limit on the size of sabots or conicals they want you shooting out of your rifle.... CVA has limits.

little-d

i have shot about 80 rounds or so with my mk 85 using 120 gr of 777 and a 300gr bullet,i use the cci 209 primer to set it off. It kicks but i have got very good results using this load it holds true out to about 90 yards before it starts to drop. And i am getting complete passthrough shots on deer and hogs at a 100 yards. I shot a big doe tuesday at 137 yards i held 2 inches high on her back and the bullet hit right below the backbone. After the season ends i am going to try a new bullet its just a tad smaller and i am going to start the 777 at a 100gr and work around that till i get it right.