30-06 interlock 180grn advice.

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krips17

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Hey all. I'm just getting into reloading and I have a questions about a load I'd like to try. Can't find anything online about my specific load up but many close to.

Powder: hodgdon H-4831sc
Bullet: 180 grn hornady interlock spbt
Rifle: remington 700

I've been crossreferencing a few load manuals and some data off load data.com. I want to try starting at 55grns and working my way up to a max of about 61grns. Hornady lists a col of 3.225" for the 180. My bullets hit the lads of my chamber at 3.400". The millwright in me says that's a large gap... Is it actually an issue?

I'm also basing my load off of loads published using Sierra game king spbt( I've read that I can use that data for the hornady interlocks on forums). They list a col of 3.300". Is the charge data going to be no good given the difference in case overall length?

Any advice is greatly appreciated.
 
The 3.225 loading of the interlocks is to match the cannelure on the bullet for crimping if one wants to do that. The jump to the lands isn’t an issue as far as safety goes. If you load a different powder than in the Hornady manual then I can’t say if that load is safe but the COAL is not usually critical as far as pressure goes unless you are jamming the lands.
 
Just for crimping hey. So I'm good to have the bullet seat depth a little less for more space in the cartridge without sacrificing accuracy?
 
You will find that there a number of ways to load for accuracy, how far off the lands, the powder, the load of powder, the brass, the primer, the bullet, etc. it really is a trial and error to see what your rifles likes best. Part of the fun of reloading.
 
Im a few shots away from loading 170gr interlocks! a RN version... we can assume is for the 30-30 wcf,
im fairly keen on them too!
 
The only time I worry about cannulures in a rifle is if it's being used in a semi: the specified COAL promotes reliable feeding in the various chambers / platforms and crimping on the cannulure helps prevent bullet set-back due to the recoil.
 
Or in a lever..............save your components..........................Ken Waters Pet Loads 58gr/H-4831/180gr
 
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If the loaded round still fits in the mag well with the bullet seated out close to lands, then give 'er. Otherwise, seat the bullet to fit in the mag well (and still chambers with no issues) and go from there.
 
mbogo3 said:
Or in a lever..............save your components..........................Ken Waters Pet Loads 58gr/H-4831/180gr
Click to expand...

Shot truckloads of 180 grain interlocks in a .30-06 with this load. I switched to H4350 over the last few years because I was having better luck finding it when I needed it. It has been performing admirably and has accounted for a number of moose. My load over the chrony is producing just over 2700 fps. The bullet never has an issue with that velocity and performs as designed.
 
You got good advice here. I'll only add to separate your cases so that you aren't mixing different head stamps ( brands). Or develop your max. load bases on the heaviest case brand ( I usually find this is Federal) which logically has the most brass, = the smallest inside case capacity. Weigh a few cases of each brand, if they all weigh approx. the same, you can use the same data in all. if you have some very heavy or light cases, you may want to develop adjusted loads for them.
 
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