Porting a MZ barrel?

[antleredacres]

Howdy: I've worked up a very good load for my NULA .50. Duplex 19/51, N110/322. Shooting real good. However, recoil is stout but manageable. Muzzle rise is quite a bit. Anybody have any experience with Mag-na-port or the like? Is it worthwile? Thanks

[edge]

I am not sure what problems you might have with sabots.

Sabotless shooter don't have the plastic issue.

edge.

[bigmoose]

Knight made a ported Rifle called the Grizzly, it was not recommeded for sabots, they took mine it back, for 100.00, and sent me new new rifle unported.

[nate121080]

Bigmoose I had one of those knights. Also had the predator series. Both were beautiful rifles that I wished I still had. The only ported gun I've had experience with is a Gonic 50 cal and the ports did not seem to effect accuracy one bit. It does feel like its shredding the sabot when you push it through but accuracy was exceptional. What bullet are you shooting in the nula with that duplex? I have a nula and also have both of those powders. Was going to do some tinkering at the range next week.

[bigmoose]

I don't have an nula, I only shoot single powders H4198 and Benchmark.
I have had great success with single powders so I never tries duplex.

[mike3132]

There have been a few guys who tried muzzle brakes or porting and most didn't like them. You have to make a sleeve or removable brake to load them and if I remember right the accuracy was bad. Easier for you to work up a reduced load. Mike

[antleredacres]

Thanks for the replys. I'll scratch the idea of porting. I'm getting very nice accuracy with the .50 cal Barnes 250gr. TMZ with a Harvester Yellow (made for boatails) sabot. Heading to Ill. next week for the MZ only hunt where I hope to ground proof the load on a whitetail.

[mike3132]

Dec 2, 2010 5:43:57 GMT -5 antleredacres said:

Thanks for the replys. I'll scratch the idea of porting. I'm getting very nice accuracy with the .50 cal Barnes 250gr. TMZ with a Harvester Yellow (made for boatails) sabot. Heading to Ill. next week for the MZ only hunt where I hope to ground proof the load on a whitetail.

When you pull the trigger on that big buck I'll guarantee you wont feel a thing! Good luck, Mike

[esshup]

Interesting comments on porting. I never paid it much attention for the muzzleloader. But, my Tar-Hunt is ported, and I have a few muzzle brakes on CF rifles. The add-on brakes are a few thou larger than the bore (internally).

I have a number of shotguns that are ported as well, and have little plastic build up in them, even tho the volume of shooting is considerably more than what a ML would see. The best porting that I have on a shotgun are the Laser Ports. They are only on the top of the barrel, right along the side of the rib.

The partition style brake that I have on the big 7mm makes it feel like a .243.

[antleredacres]

Thanks for all your replys. Great info. I did some more shooting today and adjusted my load down to 14gr. of N110 as a starter and stayed with 51gr. of the H322. I liked the results. Getting a 3 shot cluster at 100yds. with the .50cal 250br Barnes TMZ/Harvester Yellow sabot. My chrono shows an average of around 2400fps + or -. Switched to the CCI 209M primer. Temp around 25 deg. up here in the U.P. of Mich. Anyway, accurate and reliable. Everything I want in a hunting load. I know I could duplicate the 2400fps with straight N110. However, maybe just my imagination but the Duplex seems more manageable and not what I perceivewith as a sharper recoil from the straight N110 in my NULA. Enough load development. Time to go hunting! Thanks guys

[rangeball]

Dec 2, 2010 11:41:41 GMT -5 antleredacres said:

I know I could duplicate the 2400fps with straight N110. However, maybe just my imagination but the Duplex seems more manageable and not what I perceivewith as a sharper recoil from the straight N110 in my NULA.

Just to add to your decision to duplex I routinely blow sabots at 2300 fps (42gr N110) with barnes 250gr flat base in warmer temps. Cooler temps may solve the problem but not something you want to be dealing with or worrying about this close to season.

Good luck

[Dave W]

65gr of powder with a 250gr bullet at 2400fps may/may not be temp sensitive. That is a lot of powder to only get 2400fps.

[bigmoose]

I know shooting a big boomer at the range, with a brake Make you the most unpopular gent in town.

Recoil is a personal decision,If I had a rifle I could not handle comfortably I'd trade it for one I could.

i

[edge]

Many long range folks like ported rifles so that they can spot their own shots, not necessarily for the recoil aspect.

edge.

[bigmoose]

I say potato

you say pototo ;D

[Richard]

There you go Edge! Right on! In the 600 and 1,000 yard game, not all ranges have "pits" where you have a sighter target and a record target....In the pits are "people" who raise and lower the sighter after each shot and put a large "paster" on your hit. The other ranges use berms either if front of or alongside of your target. When you fire your sighter, you immediately get your eye back in the scope and you can see your impact. Depending on your caliber/cartridge at 1,000 yards, you may or may not see the hit without a brake. At 600, you definitely need a brake. They definitely have a place in some of the disciplines and do work well. And.........they do not impair accuracy! I see no reason why they would not work out on a ML shot sabot less! Saboted??? probably not so good!
Richard

[deadeye]

my personal mz brake-non-smokeless was better accuracy & approx 50% less recoil,my gunsmith has done several brakes for smokeless & sabot users-his reply-nothing different than a rifle brake,the plastic is a non issue except the build-up inside the bore which has nothing due to the brake. and yes there is build-up,you would love to hear some of his finding's after dipping for bluing as far as plastic(mz's) & carbon(cf's)

[spoonover]

250 Hornady XTP 0.452 0.147 H 322 48 VV N110 13 2559, pulled this off the duplex load chart. Could it be a longer barrel? Help me out here?

[Richard]

Spoonover..........Trying to figure out how your post relates to barrel porting???
What are you talking about with the longer barrel? The .147..............what is that referring to?
You should probably start a NEW thread and then be a bit more clear as to your question.
Richard

[spoonover]

Dec 2, 2010 11:41:41 GMT -5 antleredacres said:

Thanks for all your replys. Great info. I did some more shooting today and adjusted my load down to 14gr. of N110 as a starter and stayed with 51gr. of the H322. I liked the results. Getting a 3 shot cluster at 100yds. with the .50cal 250br Barnes TMZ/Harvester Yellow sabot. My chrono shows an average of around 2400fps + or -. Switched to the CCI 209M primer. Temp around 25 deg. up here in the U.P. of Mich. Anyway, accurate and reliable. Everything I want in a hunting load. I know I could duplicate the 2400fps with straight N110. However, maybe just my imagination but the Duplex seems more manageable and not what I perceivewith as a sharper recoil from the straight N110 in my NULA. Enough load development. Time to go hunting! Thanks guys

Richard,
Copied this off of the forums duplex loads 13/48 vv 110 - h322 @ 2559 fps.

Antlers load is 14gr. of N110 and 51gr. of the H322 @ 2400.

That is a lot or fps difference from his load and the forums load?