Reamer finally arrives but no factory ammo available it seems

[Brithunter]

I had looked at that brass and noted the price . I have ann account with Midway now as that's where the reamer came from. They had one on the shelf and makers did not. They didn't have the gauges though so they were ordered from Foster direct. The proble is that SAAMI decided to re-design the .280 AI so there is a difference and although we have tried getting the information no one seems to be willing to share. SAAMI in their wisdon moved the postion of the shoulder and it seems a true Ackley .280 will not chamber in the SAAMI spec chamber.

My real problem is not knowing which specs the tooling I have is made too. Muir kindly sent me a cahmber print which shows the shoudle position at 1.99" yet another drawing shows this shoulder at 2.090". My No-Go gauge has the size 2.104" etched upon it so I am guessing that this gauge is for the 2.090" dimension and not the 1.99" one.

Why the hell SAAMI had to mess witht eh dimension is anyones guess but mine is they didn't like Ackley so messed his design up. The net result is that it's not worth buying the Nosler brass as it might not fit teh chamber as the Nosler is of SAAMI spec. When i decided upon this and got the variation to do it I was not aware of this messed up state that SAAMI in the wisdom have caused.

Now a thought has occured to me this morning. Rather than wait days or weeks for a new gauge to show up or months for the Post office to look into the lost and possible cough up excuse me whilst I recover from that thought . Perhaps I should put the gauge up in the cylindrical grinder and take 0.006" off the face and make it into a go gauge. It's not as if I am hiring the guage and reamer out. Or do I simply use the No-Go and chamber it using a depth micrometer to Ackleys spec of 0.004" short so that a normal .280 remington factory round should ahve a slight crush fit.

EDIT:-

Ahhh finally a box of Remington .280 remington has arrived at the local(ish) RFD. I jsut phoned to check and it has just arrived, well yesterday, they are sorting and pricing the order now. So this afternoon I shall drive over to collect it. Only a 73 mile round trip !!!. We can now move along.

 

[pnse]

I had looked at that brass and noted the price . I have ann account with Midway now as that's where the reamer came from. They had one on the shelf and makers did not. They didn't have the gauges though so they were ordered from Foster direct. The proble is that SAAMI decided to re-design the .280 AI so there is a difference and although we have tried getting the information no one seems to be willing to share. SAAMI in their wisdon moved the postion of the shoulder and it seems a true Ackley .280 will not chamber in the SAAMI spec chamber.

My real problem is not knowing which specs the tooling I have is made too. Muir kindly sent me a cahmber print which shows the shoudle position at 1.99" yet another drawing shows this shoulder at 2.090". My No-Go gauge has the size 2.104" etched upon it so I am guessing that this gauge is for the 2.090" dimension and not the 1.99" one.

Why the hell SAAMI had to mess witht eh dimension is anyones guess but mine is they didn't like Ackley so messed his design up. The net result is that it's not worth buying the Nosler brass as it might not fit teh chamber as the Nosler is of SAAMI spec. When i decided upon this and got the variation to do it I was not aware of this messed up state that SAAMI in the wisdom have caused.

Now a thought has occured to me this morning. Rather than wait days or weeks for a new gauge to show up or months for the Post office to look into the lost and possible cough up excuse me whilst I recover from that thought . Perhaps I should put the gauge up in the cylindrical grinder and take 0.006" off the face and make it into a go gauge. It's not as if I am hiring the guage and reamer out. Or do I simply use the No-Go and chamber it using a depth micrometer to Ackleys spec of 0.004" short so that a normal .280 remington factory round should ahve a slight crush fit.

EDIT:-

Ahhh finally a box of Remington .280 remington has arrived at the local(ish) RFD. I jsut phoned to check and it has just arrived, well yesterday, they are sorting and pricing the order now. So this afternoon I shall drive over to collect it. Only a 73 mile round trip !!!. We can now move along.

here's a link with the difference in the two rounds sammi v standard 280 ackley http://gunsmithtalk.wordpress.com/2010/01/13/280-ackley-improved-alert/
atb Paul

 

[Brithunter]

Thank you I have read that link and several others and the strange thing is that there still seems to be differences. Anyway i have picked up the Box of Remington Premier Boat Tail 140 Gr PTD. This should be gold plated at the damn price. Over £40 for a box of 20, that's over £2.50 per pop .

Bloody rip of artists the importers.

I shall start sorting out the set up for reaming tomorrow.

 

[flytie]

Thank you I have read that link and several others and the strange thing is that there still seems to be differences. Anyway i have picked up the Box of Remington Premier Boat Tail 140 Gr PTD. This should be gold plated at the damn price. Over £40 for a box of 20, that's over £2.50 per pop .

Bloody rip of artists the importers.

I shall start sorting out the set up for reaming tomorrow.

Brit, make sure you calm down first

ft

 

[Brithunter]

Brit, make sure you calm down first

Oh I shall. I have to do a few things first before I am ready to start reaming like set the barrel up and make sure it's not only running true radially but the breech and muzzle are on the same line so the reamer can run in dead true. Normally one wold use a lathe steady but the Colchester never came with one so I have to work around it. If I was doing this for a living I would either have to get a steady or change the lathe for one that does have one. Hopefully I can get it done by the weekend by doing it between hospital visits.

First step will be pull the new barrel off again and make up a muzzle support then clock it up before even thinking of reaming. Also have to take a few measurements to get the exact position of the bolt face in relation to the receiver front ring face and the end of the barrel tenon. Due to the counterbored breeching of the BSA one cannot simply come off the barrel face. The old addage measure twice and cut once comes to mind.