Canadian IVI match .308 Ammunition


#1

Just some FYI for all you ammofiles out there…

It does exist…

Its a 168gr Sierra bullet and it chrono’s at just over 2600 fps out of a 24 inch barrel.

As for powder… no idea… when I was talking to the techs… all they would tell me is its a special cannister grade not available to the public.

The bullet is also crimped… maybe why its not as accurate as I hoped it would be. Primer is sealed with a red sealant.

It was suppose to be a contender for the new ammo trials to replace the standard issue Norma ammo thats being currently used. Its also not official issue with DND (Department of National Defence).

COAL = 2.791 inches

Boat tail bullet with black sealant and slight crimp.

Tubular stick powder weighing 39.9 grains.


#2

To get that velocity with a 168 grain bullet, from the propellant weight, the propellant used would have to be very similar in burning rate to IMR3031 (single base), or the old Hercules HiVel #2 (double base), both of which are single-perf extruded and look about like your picture. What was the accuracy performance, and what did you expect? I’d think that the use of bullet sealant (which appears to be present) is not a great idea for match ammunition.


#3

It was MOA… but not as good of a group as the ammo it was suppose to replace (Norma match). Not just the sealant… but there is a minor crimp present as well… again not conducive for great accuracy…


#4

I have loaded some very tight grouping .308 loads using IVI brass, so it’s probably a good starting point. At least in my experience, they demonstrate very good weight uniformity. I’d expect the bullet to be more responsible for less than perfect performance than anything else. As one of my friends at Federal used to say, “It’s difficult to make a good bullet shoot badly, and even more difficult to make a bad bullet shoot well.”


#5

[quote=“DennisK”]

I’d think that the use of bullet sealant (which appears to be present) is not a great idea for match ammunition.[/quote]
That was my first thought as well, definitely counterproductive but its probably intended to double as sniper grade so requires full Mil-spec Despite the OP stating it is not issued


#6

I remember a few select lots of DA 62 with the 147 gr that were issued to a friend as pratice ammunition for Bisley I believe.
These rounds were still sealed in the green plastic bandoliers.

They shot well under .5 for five rounds at one hundred yards in my brothers M 88 Win consistently with that tar sealent .

I will see if I can find the Speer manual with my notes of powder type and weight loaded for historical reference .

I can dig up some fired brass but I had given away my last fifteen loaded rounds in 1992 .

Glenn


#7

Dennis - Absolutely correct. The three most important components in any match cartridge are, 1) Bullet. 2)Bullet. 3) Bullet. Powder type and charge weight come in fourth and primer and case a distant fifth and sixth. Benchrest and other Competition shooters do give considerable attention to powder charge and weight, but in very forgiving cartridges like the 6PPC, more than it deserves.

Ray


#8

The trouble with tar sealant is that it tends to form a carbonised residue, often referred to as varnish, in the lead (leed) of the rifling. Not necessarily injurous to accuracy but another variable.