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Re: Possible .303 conversions

Post by AusTac » 31 Oct 2017, 10:00 am

Make it a .50!
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Re: Possible .303 conversions

Post by andym79 » 31 Oct 2017, 1:58 pm

No 475!

A 475 linebaugh would work well. But I think a 460s&w might be good.
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Re: Possible .303 conversions

Post by Tripod » 31 Oct 2017, 5:10 pm

andym79 wrote:No 475!

A 475 linebaugh would work well. But I think a 460s&w might be good.

Both of those are well beyond the pressure limit of a SMLE action, Especially the 460.
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Re: Possible .303 conversions

Post by Tripod » 31 Oct 2017, 6:48 pm

bentaz wrote:
Tripod wrote:
andym79 wrote:No 475!

A 475 linebaugh would work well. But I think a 460s&w might be good.

Both of those are well beyond the pressure limit of a SMLE action, Especially the 460.

Plus I've got an old shot out martini Enfield anyway.

The number of ideas I would like to build on a ME but I never find a donor. :(
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Re: Possible .303 conversions

Post by Mr.Seacucumber » 01 Nov 2017, 9:20 am

Wait how do you make a 30/303? Do you just need to re barrel it? How do you make e cases?
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Re: Possible .303 conversions

Post by Mr.Seacucumber » 01 Nov 2017, 1:48 pm

bentaz wrote:I think you just ream a 303 chamber into a 308 barrel.


Well how hard can that be?

....
.....

I mean how expensive can that be?
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Re: Possible .303 conversions

Post by bladeracer » 01 Nov 2017, 3:36 pm

Mr.Seacucumber wrote:
bentaz wrote:I think you just ream a 303 chamber into a 308 barrel.


Well how hard can that be?

I mean how expensive can that be?


Buy a reamer and do it yourself.
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Re: Possible .303 conversions

Post by Mr.Seacucumber » 01 Nov 2017, 7:33 pm

bladeracer wrote:
Mr.Seacucumber wrote:
bentaz wrote:I think you just ream a 303 chamber into a 308 barrel.


Well how hard can that be?

I mean how expensive can that be?


Buy a reamer and do it yourself.


I'll need reloading dies though?
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Re: Possible .303 conversions

Post by bladeracer » 01 Nov 2017, 7:50 pm

Mr.Seacucumber wrote:I'll need reloading dies though?


Maybe, maybe not. Try the standard .303 dies first. If they don't give enough neck tension you might need a .308 sizing die to size the neck down that touch extra.

You are talking about a simple standard .303 but with a .308 bore aren't you?
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Re: Possible .303 conversions

Post by andym79 » 01 Nov 2017, 7:57 pm

Tripod wrote:
bentaz wrote:
Tripod wrote:
andym79 wrote:No 475!

A 475 linebaugh would work well. But I think a 460s&w might be good.

Both of those are well beyond the pressure limit of a SMLE action, Especially the 460.

Plus I've got an old shot out martini Enfield anyway.

The number of ideas I would like to build on a ME but I never find a donor. :(


Is the ME much stronger?

I am by no means knowledgeable about the SMLE.

Is the No4 any stronger?

I was basing pressure ratings on CIP data, in my opinion the Americans and SAAMI, tend to down rate pressure ratings of most European and Russian rifles/cartridges! I can't think of any reason they might frequently do that ;)

According to American sources the M96 is garbage and is barley fit for the 6.5x55 and could never take a 308, the K98 is okay but so weak compared with their M1903 and the Mosin is just Russian garbage! (on a side note I read about a rifle destruction test where a load with a full case of Unique was used in a 30-06 M1903 and the same in a M91/30, the M1903 failed catastrophically, the author predict even worse failure for the M91/30, it was pretty sick after, but didn't actually fail catastrophically.

Anyway back to the case in point, CIP rate the 303 at 53,000 psi (I assumed that as by the far the most common rifle would be a SMLE, that they based it on that :problem: )
475 Linebaugh at 50,000 psi
460 S&W at 57,000 psi so a define :problem: there!
However the Mosin according to CIP can take 56,000 psi and therefore could theoretically handle the 500 S&W at 54,000 psi.

As I said, I can't speak of the SMLE, but I trust CIP and the Europeans over the SAAMI setup.
Last edited by andym79 on 01 Nov 2017, 8:00 pm, edited 1 time in total.
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Re: Possible .303 conversions

Post by Mr.Seacucumber » 01 Nov 2017, 7:58 pm

bladeracer wrote:
Mr.Seacucumber wrote:I'll need reloading dies though?


Maybe, maybe not. Try the standard .303 dies first. If they don't give enough neck tension you might need a .308 sizing die to size the neck down that touch extra.

You are talking about a simple standard .303 but with a .308 bore aren't you?


Yeah that's the idea, just so I can use 308 bullets, more specifically those Berger ones.
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Re: Possible .303 conversions

Post by Tripod » 01 Nov 2017, 8:08 pm

Mr.Seacucumber wrote:
bladeracer wrote:
Mr.Seacucumber wrote:I'll need reloading dies though?


Maybe, maybe not. Try the standard .303 dies first. If they don't give enough neck tension you might need a .308 sizing die to size the neck down that touch extra.

You are talking about a simple standard .303 but with a .308 bore aren't you?


Yeah that's the idea, just so I can use 308 bullets, more specifically those Berger ones.

The reamer will need to have a .308 pilot instead of the .311 pilot and 303 dies with the expander polished down 3 thou will sort out the dies. Alan Swan did mine on a Siamese Enfield
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Re: Possible .303 conversions

Post by andym79 » 01 Nov 2017, 8:25 pm

What are your thoughts on CIP pressure ratings, see my post above.

Is the No4 stronger than the 1,2 and 3.

(as a less important side note, if I were to do a 475, they would be loaded light with cast bullets).
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Re: Possible .303 conversions

Post by Tripod » 01 Nov 2017, 9:43 pm

andym79 wrote:What are your thoughts on CIP pressure ratings, see my post above.

Is the No4 stronger than the 1,2 and 3.

(as a less important side note, if I were to do a 475, they would be loaded light with cast bullets).

The No4 is stronger. As for doing a 475 I always make sure no-one in the future can blow anyone up from one of my creations by staying within the pressure limits of the action I am using if there is factory ammo available, If it is a wildcat then this becomes irrelevant.
If anyone wants to do a 44mag conversion I have a spare 44 barrel and a Desert Eagle magazine that I was going to do using a SMLE action
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Re: Possible .303 conversions

Post by andym79 » 01 Nov 2017, 10:03 pm

Tripod wrote:
andym79 wrote:What are your thoughts on CIP pressure ratings, see my post above.

Is the No4 stronger than the 1,2 and 3.

(as a less important side note, if I were to do a 475, they would be loaded light with cast bullets).

The No4 is stronger. As for doing a 475 I always make sure no-one in the future can blow anyone up from one of my creations by staying within the pressure limits of the action I am using if there is factory ammo available, If it is a wildcat then this becomes irrelevant.
If anyone wants to do a 44mag conversion I have a spare 44 barrel and a Desert Eagle magazine that I was going to do using a SMLE action


Now that sounds like a very interesting project, it would wet my appetite a lot more if it were 444m.

Do you think CIP are optimistic at 53,000? I would be trying to keep pressure of the 475 at 20-30k. Short of engraving a warning on the rifle I am not sure how you could stop a future owner run 50k loads.

Is the no4 a 43k or a 53k action?

Plus I may be wrong but are a lot of saami figures old and in cpu? CIP update 303 in 2008, what other rifles are chambered in 303?
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Re: Possible .303 conversions

Post by Tripod » 02 Nov 2017, 7:56 am

andym79 wrote:
Tripod wrote:
andym79 wrote:What are your thoughts on CIP pressure ratings, see my post above.

Is the No4 stronger thapn the 1,2 and 3.

(as a less important side note, if I were to do a 475, they would be loaded light with cast bullets).

The No4 is stronger. As for doing a 475 I always make sure no-one in the future can blow anyone up from one of my creations by staying within the pressure limits of the action I am using if there is factory ammo available, If it is a wildcat then this becomes irrelevant.
If anyone wants to do a 44mag conversion I have a spare 44 barrel and a Desert Eagle magazine that I was going to do using a SMLE action


Now that sounds like a very interesting project, it would wet my appetite a lot more if it were 444m.

Do you think CIP are optimistic at 53,000? I would be trying to keep pressure of the 475 at 20-30k. Short of engraving a warning on the rifle I am not sure how you could stop a future owner run 50k loads.

Is the no4 a 43k or a 53k action?

Plus I may be wrong but are a lot of saami figures old and in cpu? CIP update 303 in 2008, what other rifles are chambered in 303?

Unfortunately CUP and PSI get mixed up all the time, A lot of reloading manuals will have a * beside any loads for the 303 British or it's offspring due to it also being made in the P14, Ruger No1 and a few other stronger actions.
If you wanted it to be safe in a Enfield action leave the parent case the original length and stamp it 475-70 Then there is no factory ammo and if someone in the future handloads it to hot for the action it is their fault for overloading the action.
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Re: Possible .303 conversions

Post by andym79 » 02 Nov 2017, 9:57 am

So would you trust an ME over a NO4 for a case like the Linebaugh?
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Re: Possible .303 conversions

Post by Tripod » 02 Nov 2017, 12:27 pm

andym79 wrote:So would you trust an ME over a NO4 for a case like the Linebaugh?

No, But would I like a ME in 45-90 or 50-110 throwing cast pumpkins at 45-90 or 50-110 pressures then Hell Yes. :clap:
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Re: Possible .303 conversions

Post by andym79 » 02 Nov 2017, 3:13 pm

I won't do a 475 Linebaugh, but I might do a 12x33R.

I for a long time fancied a Martini Enfield in 50-90, the brass was hard to come by and some have stock piled it and want $5 a case. I like my odd, I am willing to do and spend on odd, but $5 for a piece of brass, when Starline sell it in the US for $1.75 AUD, it was too rich for me!
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Re: Possible .303 conversions

Post by Tripod » 02 Nov 2017, 7:08 pm

I payed $1/case for 50-110 Still looking for the action to build it on.
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Re: Possible .303 conversions

Post by andym79 » 02 Nov 2017, 7:32 pm

Tripod wrote:I payed $1/case for 50-110 Still looking for the action to build it on.

$1!!!

Was that a while ago or were they desperate for cash. Most cases fetch near a $1 for a fraction of the brass.

ME are one of the few actions plebs might be able to get. I have fancied doing stuff on an 1885 or #1 but $1500 then a re-barrel etc $2500 rifle. Shame you can't just buy 1885 actions.
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Re: Possible .303 conversions

Post by Tripod » 02 Nov 2017, 7:38 pm

Not just the cases, I also have moulds, Timber for a stock and a barrel sorted but I am yet to find an action at what I would call a reasonable price.
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Re: Possible .303 conversions

Post by Gamerancher » 03 Nov 2017, 9:28 am

Montana Vintage Arms makes 1885 actions, they do however start at a bit over $1100 U.S. :shock:
There is also a limit to how long a case can be and still load in a Martini action, a bit like Remington rolling blocks, the angle is the limiting factor.
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Re: Possible .303 conversions

Post by straightshooter » 03 Nov 2017, 10:38 am

If anybody on this thread is interested in a Martini action please PM me.
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Re: Possible .303 conversions

Post by andym79 » 03 Nov 2017, 6:27 pm

Gamerancher wrote:Montana Vintage Arms makes 1885 actions, they do however start at a bit over $1100 U.S. :shock:
There is also a limit to how long a case can be and still load in a Martini action, a bit like Remington rolling blocks, the angle is the limiting factor.


A bit too rich for me, by the time you got that over here its about $2200 :(
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