Winchester SRP + H4350 + Lapua Small Rifle Brass = OK?

[Joeg26er]

Winchester SRP + H4350 + Lapua Small Rifle Primer Brass = OK?

Also have Varget to work with

Would like to know if this is a dead nuts reliable recipe before plunking down for some Lapua small rifle primer brass at about $1 per casing

Thanks also for any load recipes for Sig Cross 18" or Tikka Tac A1 20" PVA barrel (have one of each rifle) will use with Dead Air Nomad LT

 

[Krob95]

Uh. What cartridge? Sounds like maybe 6.5cm?

 

[Joeg26er]

yes- edited - 6.5 CreedMoor: Winchester SRP + H4350 + Lapua Small Rifle Brass = OK?

 

[KnowNothing256]

Yes ok. Send it.

 

[Joeg26er]

I have heard reports of hang fires but I think that was with non Winchester small rifle primers?

I have Hornady ELDX 143g and Barnes Matchburner 140g
Appreciate any load development people might want to share for Sig Cross or Tikka Tac A1

 

[KnowNothing256]

Did a little research on primer “strength,” this was as far as I got before I got tired of doing it:

You are being redirected...

 

[larryh128]

yes- edited - 6.5 CreedMoor: Winchester SRP + H4350 + Lapua Small Rifle Brass = OK?

There was an article not that long ago on large vs small in 6.5 Creed. There were some stating it was a bad idea to use small primer brass in anything but hot weather. The comparisons they did ended up showing no advantage by going small primer. I'm sure some will disagree but that was coming from people a hell of a lot smarter and with better equipment than I will ever own.

 

[KnowNothing256]

There was an article not that long ago on large vs small in 6.5 Creed. There were some stating it was a bad idea to use small primer brass in anything but hot weather. The comparisons they did ended up showing no advantage by going small primer. I'm sure some will disagree but that was coming from people a hell of a lot smarter and with better equipment than I will ever own.

But no disadvantage either?

 

[larryh128]

But no disadvantage either?

Disadvantage was inconsistent ignition. If I remember correctly, the large primers produced better accuracy and lower sd

 

[KnowNothing256]

Disadvantage was inconsistent ignition. If I remember correctly, the large primers produced better accuracy and lower sd

Which SRPs were they using?

ETA: Found this article, results slightly favored Wolf LRP over CCI 450 on SDs in Starline brass with a larger flash hole, but there were multiple charge weights of H4350 where the SRP had better SD than the LRP. Results look to be pretty inconclusive to me, but also Lapua has a smaller flash hole in their SRP brass (1.5mm vs 2.0mm), so it'd be interesting to compare Lapua LRP vs SRP brass instead of Starline.

Does primer size matter? 6.5 Creedmoor small v. large rifle primer brass comparisons

Does primer size matter? 6.5 Creedmoor small v. large rifle primer brass comparisons Most rifle shooters, myself included, tend to view the use of a small rifle primer in a larger center-fire cartr…

rifleshooter.com

And another article assessing the differences:

TESTED: Lapua 6.5 Creedmoor Brass (Large and Small Primer) – Ultimate Reloader

ultimatereloader.com

 

[Joeg26er]

answer found in an Outdoor Wire article - Lapua says:

"“We’ve found that for some applications, like tactical semi-automatic rifles, a Large Rifle Primer is required to ensure function and performance. Lapua created this product to meet that requirement.”"in inclement weather conditions. The Large Rifle cases improve ignition consistency where extreme temperature swings are prevalent."