300 Norma
- Thread starter donno
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Chad Dixon at LRI can supply a K&P barrel chambered to suit your selected cartridge configuration.
Numerous .300NM shooters are migrating to the .300NM 35 degree Improved.
Other gunsmiths known for .300NM:
Alex Wheeler
Ryan Pierce
Action selection will be a key consideration.
Since .300NM barrels are a "consumable", an action machined for pre-fit barrel can save you time and expense shipping your action to a gunsmith each time you need a new barrel fitted.
Speaking of barrel life...suggest you avoid N570 powder.
The .300NM thread in Reloading forum has lots of useful information, too.
Numerous .300NM shooters are migrating to the .300NM 35 degree Improved.
Other gunsmiths known for .300NM:
Alex Wheeler
Ryan Pierce
Action selection will be a key consideration.
Since .300NM barrels are a "consumable", an action machined for pre-fit barrel can save you time and expense shipping your action to a gunsmith each time you need a new barrel fitted.
Speaking of barrel life...suggest you avoid N570 powder.
The .300NM thread in Reloading forum has lots of useful information, too.
You should only ever need to ship your action to the same smith once.
There is a lot of info on Accurateshooter.com from Ryan about 300 Norma IMP. chambers. I shoot his on a Kelblys action which was a mistake . Dont get me wrong Ryans work shined . There is one component overlooked with this round and that is the proper sized action . If you talk with Alex Wheeler he will bring this up . Bolt set back can be an issue . Therefore look at Jim Bordens Big Foot action which is made for this Chamber . Ryan Pierce at https://www.piercisionrifles.com/ did have them in stock with a timed trigger.
Other wise look for a Bat M action . Once you get involved with the 300 N improved you will be hooked . 230gr Berger hybrid /N570 is the combo for the win . Remember case capacity ,meaning fill ratio is important, N570 is a long stick powder which fills the case up and is very consistent.
A couple of question on the Norma Imp. With the extra speed of the Improved, how many rounds per barrel?
I guess you are fire forming your own brass? tia
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The improved version is to improve the design overall. I found factory Berger ammo ,230,s over H1000 @2950+ to be accurate and consistent. On the other hand 215s @3150 /N570 where also accurate and consistent.
The bbl of choice is a Brux HP 26" 1:9.
Expect 600-900 rds conservativly.
When it comes to FF brass. Make sure your chamber is for Lapua or which ever brass you like, there not all going to work in every chamber.
The chamber indexes of the neck shoulder so factory ammo will FF. Like I said earlier factory ammo shoots lights out at 2950.
Going forward get a seating die blank and have a FLR die made. Take good notes.
Look out for a shinny ring at the base and an inside doughnut which matches up in location. This means your brass is cooked.
After just one firing your brass will be close if not blown out to the imp. Spec.
If your just starting out. There will be a lot of time getting your ballistic calc. Set up . Learning about azimuth angle. Not sure thats spelled right... reading the wind etc.
1k to 15 yds has more variables.
The first time you send a round and can count 1001 before theres a splash on target. Youll be hooked!
The bbl of choice is a Brux HP 26" 1:9.
Expect 600-900 rds conservativly.
When it comes to FF brass. Make sure your chamber is for Lapua or which ever brass you like, there not all going to work in every chamber.
The chamber indexes of the neck shoulder so factory ammo will FF. Like I said earlier factory ammo shoots lights out at 2950.
Going forward get a seating die blank and have a FLR die made. Take good notes.
Look out for a shinny ring at the base and an inside doughnut which matches up in location. This means your brass is cooked.
After just one firing your brass will be close if not blown out to the imp. Spec.
If your just starting out. There will be a lot of time getting your ballistic calc. Set up . Learning about azimuth angle. Not sure thats spelled right... reading the wind etc.
1k to 15 yds has more variables.
The first time you send a round and can count 1001 before theres a splash on target. Youll be hooked!
I think I get it. it's the case/tenon diameter ratio. Not enough supporting steel. And probably why Remington only offered 338LM chambered police rifles for a very short time.
I can't help with the OP's question but thought that I would provide this video as a confidence booster for that cartridge. Almost 2.2 miles with a TOF of about 9 seconds.
My apologies for the thread drift.
My apologies for the thread drift.
I cool my barrel every 5 rounds, that dude don’t give a fuuuuuuuck
I use to do that as well. However, I put a temperature strip on the barrel. So when it gets up to 110 degrees, I let it cool.
When the temperature drops back down to what the ambient temperature is, I start shooting again. Depending on what the outside temperature is, I can shoot about 10-12 rounds before I pause shooting again.
That's true and why I picked 110 as my stopping point. I run a bore scope through it after every cleaning and so far it still looks good.
There's definitely a few schools of thought here. Though this discourse seems mostly academic, given the numerous .300NMs built on more standard sized actions.
I have a .300NM built on a Defiance Deviant. .750 bolt, but as a result of that it has reduced lug size. It seems to show pressure earlier than other .300NMs, which some say is a function of the action/tennon size. Or it could just be that particular barrel. I've yet to burn the original barrel out yet, so IDK.
If you value extra safety factor, doesn't hurt to go with a bigger action. The Surgeon 1581XL always seemed like a great action for this purpose - though inlets and barrels with appropriate tennon size are limited. If not, you have lots of company in more "standard" action sizes.
I'm still not convinced that the size of the action/tennon/lugs has much of a practical difference at this point. But I'm also a nobody.
I am currently considering to get a 300NM imp barrel for my CDG LA, is this a bad idea?
Going with a bigger size action seems to get rather expensive if it doesn’t fit a r700 la chassis.
I wish the 300PRC could get the 245 or 250 up to the 2850-2900 range (consistent without destroying the case) but this seems to be wishful thinking.
@Schütze
T, have you given any thought to the Rem 300 Ultra Mag?
It has a bit more case capacity than the NM, but it's the same diameter as the PRC case.
It should be able to do everything the NM can do, plus a bit more
T, have you given any thought to the Rem 300 Ultra Mag?
It has a bit more case capacity than the NM, but it's the same diameter as the PRC case.
It should be able to do everything the NM can do, plus a bit more
Loved my 300RUM that I had built years ago. 215hybrids at 3110 easily. It was a 10twist so never tried 230's in it.However, after the barrel went I went with 300PRC.
Good brass for the RUM was always an issue, that has gotten better as now couple companies making it rather than being stuck with Remington. I'm at times still tempted to do another one.
That's the problem with our hobby.
Too many choices that literally become hair splitting.
Peterson makes 300 RUM brass.
Its cheaper than Hornady per piece on Midsouth.
In theory anyways, a guy could use a LA Origin for 300 RUM.
Now need to look into mag lengths that work, reamers, and all that stuff…..
Thats a “little while from now” project and 100% can look into things and make some notes.
Its cheaper than Hornady per piece on Midsouth.
In theory anyways, a guy could use a LA Origin for 300 RUM.
Now need to look into mag lengths that work, reamers, and all that stuff…..
Thats a “little while from now” project and 100% can look into things and make some notes.
300 RUM is the KING of the 30 cal magnums. I’ve had 3 of them.
Case capacity is 114 grains H2O just shy of 338LM
Nosler brass was always hard to find and rem sucked balls
Other problem is mag freeing. Unless you go Wyatt, nothing will accommodate it because it’s so long
Case capacity is 114 grains H2O just shy of 338LM
Nosler brass was always hard to find and rem sucked balls
Other problem is mag freeing. Unless you go Wyatt, nothing will accommodate it because it’s so long
Exactly why I didn't do another barrel after using up the first one. Basically need to single feed if you want to take full advantage of the cartridge with heavy, long high bc bullets and only had Remington brass at the time I was shooting mine.
Rather than start another thread I have a question which fits in here. If not @mods please delete my post. I have a Stiller Predator action when Stiller first started making them, it has the 338 Lapua bolt. Aside from limited stock selections, are there any problems using that action for a 300 Norma Improved? Thanks.
