Thread: A few 375s

This is a copy paste of the text you sent me.

Just formed a piece of jamerson lunatic into DCM brass what an arse to do ... It holds 172.9grains of water so there is about 1 grain difference not 6 .... All BS ....

Originally Posted by L.R

This is a copy paste of the text you sent me.

Just formed a piece of jamerson lunatic into DCM brass what an arse to do ... It holds 172.9grains of water so there is about 1 grain difference not 6 .... All BS ....

Since then it has been fired with a projectile in it & not just fireformed it has grown a little as you would expect from a case that went through what this one did to be formed...

Like for like in the same brass they hold about the same amount of water.....half a grain either way is very easy to do, so measuring down the case would be even more inaccurate.

Do you have a piece of 375 DCM & Lunatic brass so you can see for yourself ?

This all started because GD said his 375 Lunatic was the biggest 375/408 Cheytac imp around & said it was 179 grains of water to prove it was the biggest.

We knew the 375 Cheytac imp I had held about 173 grains of water & a standard 375 Cheytac held about 167, we realised it was extremely unlikely for the 375 Lunatic to be 12 grains bigger in water capacity than the standard 375 Cheytac, but without brass we couldn't say for sure, with brass we can say for sure than the 375 Lunatics water capacity is not 179 grains of water as GD said, it is not even close.

Like Chris pointed out we are flogging a dead horse.....time to move on & shoot these big rifles at distances they were meant to be shot, beyond 2000

Originally Posted by Kiwi Greg

Since then it has been fired with a projectile in it & not just fireformed it has grown a little as you would expect from a case that went through what this one did to be formed...

Like for like in the same brass they hold about the same amount of water.....half a grain either way is very easy to do, so measuring down the case would be even more inaccurate.

Do you have a piece of 375 DCM & Lunatic brass so you can see for yourself ?

This all started because GD said his 375 Lunatic was the biggest 375/408 Cheytac imp around & said it was 179 grains of water to prove it was the biggest.

We knew the 375 Cheytac imp I had held about 173 grains of water & a standard 375 Cheytac held about 167, we realised it was extremely unlikely for the 375 Lunatic to be 12 grains bigger in water capacity than the standard 375 Cheytac, but without brass we couldn't say for sure, with brass we can say for sure than the 375 Lunatics water capacity is not 179 grains of water as GD said, it is not even close.

Like Chris pointed out we are flogging a dead horse.....time to move on & shoot these big rifles at distances they were meant to be shot, beyond 2000

We are not flogging a dead horse Greg you are.

GD said correctly that his 375 improved is the biggest in NZ. It is bigger than the DCM even if only be one grain.

That .50's pretty ugly.

I don't get it? But glad, you found all 6 of them.

Originally Posted by Kiwi Greg

I have been "playing" with a few 375s over the last year or so, I grew out of the 338s

Here they are with a 375 CE projectile & their water capacities, full to the top of the neck with filtered water.



375 RUM imp, 375 Terminator, 380 Terminator, 375 Lunatic, 375 DCM & 375 VM2 imp.

It has been interesting comparing performance

what came out on top in performance?

Originally Posted by Bavarian_Hunter

what came out on top in performance?

With the rig I used, Barnard P-Chey, 1.35", 32" barrel, the 375 DCM was the best.

I believe the 375 VM2 & a similar one not pictured will be faster than the DCM, but the rigs weigh considerably more useing a 50 BMG style action & 1.75" 36"+ barrel.

There maybe only 50-150 FPS in it hard to say at present as there is so little data available for them.

They will also cost a fair bit more to build, so it is hard to say whether or not they will be worth it.

Any increase in performance is helpful once you start getting out past 2000 yards

Depending on the outcome I may build one on my 416 Barrett, if it doesn't sell.....

I would like to put the brass & dies I have to good use.....

Looking at those cases actual powder capacity (base to shoulder neck junction) would have to go to the lunatic?

Originally Posted by Tui4Me

Looking at those cases actual powder capacity (base to shoulder neck junction) would have to go to the lunatic?

The necks are the same length give or take a thou, in the same brass they have the same internal capacity.

The DCM diameter is smaller at the base & bigger at the shoulder than the Lunatic by a small amount each way.

Originally Posted by Kiwi Greg

The necks are the same length give or take a thou, in the same brass they have the same internal capacity.

The DCM diameter is smaller at the base & bigger at the shoulder than the Lunatic by a small amount each way.

Actually that is not true Greg. The Lunatic has more total capacity than the DCM in the same brass and even more so when measured to the neck shoulder junction.

If you are going to call others about misleading capacities don't start doing it yourself.

That's correct Greg. Based on the early discussions I had with you the difference was about 1 grain of water in favour of the lunatic.

It's ok to say the Lunatic had more capacity Greg, it also has a longer neck. Both those points make it a slightly better designed wildcat of the cheytac case in my opinion.

I don't care if its only 1gr or half a grain, the truth is the lunatic is bigger, and when you are calling others liars you better not be lying yourself.

So its not 6 then and its all bs?
Last time a checked the bullet goes in the neck so any extra capacity from a longer neck is null and void yea?

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Exactly VC. That's why the Lunatic has a 50 degree shoulder not 40 degree. That gives the Lunatic the ability to have a longer body and slightly longer neck than the DCM. So if Greg measures just to the neck shoulder junction the lunatic will hold more water again than the DCM.

The performance advantage of 1gr of water capacity difference would be next to nothing, however they are not the same.

Originally Posted by L.R

Exactly VC. That's why the Lunatic has a 50 degree shoulder not 40 degree. That gives the Lunatic the ability to have a longer body and slightly longer neck than the DCM. So if Greg measures just to the neck shoulder junction the lunatic will hold more water again than the DCM.

The performance advantage of 1gr of water capacity difference would be next to nothing, however they are not the same.

VC pop around & measure these cases some time please