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View Full Version : Caliber change for my 03


bombdog
10-25-2015, 04:05
So, how bout a barrel in 6.5 grendel on my LN 03??? Before you think i would sacrifice a wall hanger, it was a sporter when i bought her...
Thoughts...
bombdog...
Smokeeaterpilot
10-25-2015, 07:12
Just out of curiosity, how much of a chamber pressure is that caliber?
Parashooter
10-25-2015, 10:03
QuickLOAD cites "AlexArms" as the source for a MAP of 52214 psi (piezo). But remember that it's not raw pressure but rather uncontained pressure, as from a head split, that's the main concern with possibly brittle receivers. Case failures can and do occur at significantly lower pressure.
chuckindenver
10-26-2015, 09:11
6.5-06 would be a better choice
Sunray
10-26-2015, 10:33
A low numbered '03 is not considered safe to shoot with any ammo.
A Grendel would require altering the extractor to fit the 24 thou small case head. Likely a modification to the mag well and probable the follower. Runs around 50,000 PSI according to Hodgdon.
Phil McGrath
10-26-2015, 05:56
A low numbered '03 is not considered safe to shoot with any ammo.
A Grendel would require altering the extractor to fit the 24 thou small case head. Likely a modification to the mag well and probable the follower. Runs around 50,000 PSI according to Hodgdon.

Even, .22RF?
bombdog
10-26-2015, 06:27
i thought, once upon a time, folks rebarrelled the 03 to 25/06... Probly the HN's, huh???
i was just thinking that it, the 6.5, was a reworked .308 case??? Oh well, she's had the rear target sight holes, i forget the name and the front receiver band drilled and tapped, i thought she may have been a target rifle...
Anyway, i talked to the gents at Criterian and they said they could, and would be interested in producing them, with enough interest...
Thanks for the replies...
bombdog...
chuckindenver
10-27-2015, 07:51
pressures from any wild cat built on the 30-06 would be the same... maybe lower with AI shoulder.
bombdog
10-27-2015, 06:37
pressures from any wild cat built on the 30-06 would be the same... maybe lower with AI shoulder.
Roger that, makes sense to me now... i was thinking the smaller round would drop the pressure, but firing a 130 or 140 wouldn't be much less than a 150...
Tango mike brothers...
bombdog, out...
RCS
10-27-2015, 09:20
I had this CMP barreled receiver, the barrel was burned-out and the receiver was without much finish and from 1916.

I had a quality 22 rim fire barrel installed with an extension at the rear and bought a late M2 bolt so the headspace
could be adjusted. You can also add the magazine too. This is a very accurate rim fire rifle and looks nice329763297732978
bombdog
10-31-2015, 04:18
Now there's an idea...
Where would i get the barrel and bolt???
bombdog...
louis
10-31-2015, 04:43
Bolts you can find on Numrich eBay or gunbroker. Barrels same places. I've been watching for them but they go fast.