300 Norma build what action to use!
- Thread starter 338bigdog
- Start date
I recently had the same problem and decided to go with Mausingfield. The deciding factor for me was that this time I wanted a repeater. If single shot is a possibility, I'd use a Bat M with the integral rail. They are much more readily available than the Mausingfield.
coldboreshot
Silver $$ Contributor
Would you be open to the Kelbly Atlas Tactical repeater?
LA50SHOOTER
Sworn To Protect The Constitution.
For a repeater, a BAT model HR with an appropriately sized box magazine would be a consideration.
For a single shot, a BAT model M, CT, or L would all be good actions to consider. - In 2019 Borden is tentatively coming out with a full sized 338 Lapua sized action.
Alex Wheeler
Site $$ Sponsor
I have a few in the line up, one for myself too. All Bat HRs.
barrel life isn't too bad according to my buddies that have had them, roughly 1000-1200. I was surprised with the lack of throat erosion in mine so far. I have 150 rounds through it right now and only like .006 throat erosion. I keep the barrel cool though. 3 shots and she cools down. I do the same thing with my 28 nosler.
B23
Gold $$ Contributor
My 338 Lap Imp is built on a BAT HR Pic receiver. BAT makes a beautiful action that is butter smooth.
It shares the same footprint as the 700.
The Kelbly will be cheaper than truing a 700. Youd need a new bolt also for the 700 which is $200+ This is copy and pasted from my website.
Action Work
I no longer blueprint factory actions. This is due to the fact by the time it has all the proper procedures done to it you will have way more money in it than a custom action. Heres a list of the services required to bring it to the same condition as a custom action.
Single point true action and bolt: $250
Recoil Lug: $40
Fix Bolt timing: $85
Bush Firing Pin: $85
Get a 20 moa rail and bed it to receiver: $100
Install Sako Extractor: $150
Modify receiver for wyatts extended box/required for big calibers throated for heavy bullets: $75
Open 6-48 scope base screws to 8-40: $100
Total of $885 plus the value of your 700 receiver which is roughly 3-400 dollars. Your now at 1185-1285 dollars in a factory action. I recommend guys take their 700 action to the local gun show and sell it to put that money towards a custom. Also if you were to build a custom rifle on a factory action and go to sell it you will get nowhere near what you have into it. The custom rifle with a custom action will retain alot more of its value and you have less money in it.
I sell custom actions with a 20 moa rail for $950.
Action Work
I no longer blueprint factory actions. This is due to the fact by the time it has all the proper procedures done to it you will have way more money in it than a custom action. Heres a list of the services required to bring it to the same condition as a custom action.
Single point true action and bolt: $250
Recoil Lug: $40
Fix Bolt timing: $85
Bush Firing Pin: $85
Get a 20 moa rail and bed it to receiver: $100
Install Sako Extractor: $150
Modify receiver for wyatts extended box/required for big calibers throated for heavy bullets: $75
Open 6-48 scope base screws to 8-40: $100
Total of $885 plus the value of your 700 receiver which is roughly 3-400 dollars. Your now at 1185-1285 dollars in a factory action. I recommend guys take their 700 action to the local gun show and sell it to put that money towards a custom. Also if you were to build a custom rifle on a factory action and go to sell it you will get nowhere near what you have into it. The custom rifle with a custom action will retain alot more of its value and you have less money in it.
I sell custom actions with a 20 moa rail for $950.
JBT47
Silver $$ Contributor
I would personally use a 9 or 10 twist.
LA50SHOOTER
Sworn To Protect The Constitution.
- A 1-11" twists will work for bullets up to & including 200 & most probably 210 grains. - IF you are looking to shoot 220, 230 & 240 grain bullets the least twist I'd run is a 1-10" - The 2 barrels that I'm having done presently for my 300 Norma Mag Improved build are Both 1-9" twist 5R Krieger barrels both at 30" as I'm planning to use that case capacity to an advantage to push 230 gr. Berger & Sierra bullets. - So, IMO - NO a 1-11" twist is not really what you want, unless you are purposely planning to shoot bullets only up to 200 or 210 grains. - If so, then Yes a 1-11" twist will be okay. - But why do it with the 300 Norma Mag. Improved ? - There are better balanced cartridges in case capacity that could serve this purpose like the 300 WSM or 300 WM.
moondog
Gold $$ Contributor
Are you doing an Improved or straight up?
LA50SHOOTER
Sworn To Protect The Constitution.
I'm doing a 40 degree shoulder Improved version that the shoulder is 0.004 Less at the datum to ease in the fire-forming process.
Body has approx. 1 degree of taper (case head to shoulder). - Chamber neck is 0.340 and I've already neck-turned 150 pieces of Peterson brass, 20 pieces of Norma Brass & 15 pieces of Lapua brass that were provided to me as samples by a gentleman in the Capstone Group. - I own the reamer that JGS provided. - The folks in their support/engineering group assisted me with the design based on my "dummy-round" and mark-up / red-lines to the original 300 NM drawings they had on file. - Dies will be chambered by my gunsmith (A Wilson bullet seater and a Newlon Shoulder-Bump-Neck Sizer).
moondog
Gold $$ Contributor
Would that be enough taper to work in a repeater? I have a 9twist tube I'm not sure
which road to go down with it yet. It will definitely be a repeater though.
LA50SHOOTER
Sworn To Protect The Constitution.
I don't anticipate extraction troubles, - I can let you know once the barrels come back & I run some testing. - I'm not looking to hot-rod it, just find the most accurate load for the 230 gr. Berger or Sierra at 1000 yds. - If I'm able to get 2900-3000 fps & best accuracy out of the 30" barrels I'll be very happy
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