7.62x54R shallow bullet seating

[majormarine]

This is the 150 gr flat base bullet, and i heard it is the best weight for the mosin nagant and svt-40.

however, i have one concern. you can see in the picture that in order to achieve the OAL of the 7.62x54R round, i can only seat so much of the bullet into the neck.

while it is fine for a mosin nagant, but when loading on an SVT-40, i'm afraid that the bullet might get loose even if it is crimped, because of the shallow bullet seating.

any sharing, guys?

 

[Craig67]

I'd seat it deeper and use a Lee FCD on it.

Unless your at max, then I'd reduce it 10%, seat the bullet deeper and start load development over.

Craig

 

[svt-40]

Not a proper bullet for a round. You need a longer bullet with higher BC.
And who told you that 150 is absolutely the best? Mosin shoots 175-180gr just fine.

 

[Andy]

You want the bullet seated to at least the bottom of the neck - it doesn't have to be up against the rifling. Seated like that you risk the likelihood that:

- it will be seated crookedly;
- that it could be jarred loose in handling; or
- that if you chamber it and then decide to not fire it and remove it, that the bullet will stay behind and you'll get a mess of powder.

Either seat it deeper, or use a heavier bullet.

Is that a 308 or a 312 bullet? If your barrel slugs anything larger than 308 (and it will), you'll want to use bullets made for the 303 Brit. Hornady makes a 174gr FMJ and a hunting bullet as well. Higginsons powders sells both.

 

[303carbine]

I agree with the heavier bullets,mine liked the 180 weight.

 

[Trevor2Toes]

I'd go with the 180 grain too. Here's a factory round of igman 150 grain sp 7.62x54R for comparison.