I'll bet it's one of these....(Google search led to John Wayne's 84 westerns)
1930
The Big Trail
1931
The Range Fued
1932
Two-Fisted Law
Texas Cyclone
Ride Him Cowboy
Haunted Gold
The Big Stampede
1933
The Telegraph Trail
Somewhere In Sonora
Sagebrush Trail
Riders of Destiny
The Man From Monterey
1934
West of The Devide
The Trail Beyond
The Star Packer
Randy Rides Alone
The Man From Utah
The Lucky Texan
The Lawless Frontier
Blue Steel
Neath The Arizona Skies
1935
Westward Ho
Texas Terror
Rainbow Valley
Paradise Canyon
The New Frontier
Lawless Range
The Desert Trail
The Dawn Rider
1936
Winds Of The Wasteland
The Lonely Trail
The Lawless Nineties
King of The Pecos
1937
California Straight Ahead
1938
Born to The West
Santa Fe Stampede
Red River Range
Pals of The Saddle
Overland Stage Raiders
1939
Wyoming Outlaw
Three Texas Steers
The Night Riders
New Frontier
Allegheny Uprising
Stagecoach
1940
The Dark Command
1941
Lady From Louisiana
1942
The Spoilers
In Old California
1943
A Lady Takes A Chance
1943
War of The Wildcats (In Old Oklahoma)
1944
Tall In The Saddle
1945
Dakota
Flame of Barbary Coast
1947
Angel and The Badman
1948
3 Godfathers
Fort Apache
Red River
1949
The Fighting Kentuckian
She Wore A Yellow Ribbon
I'll call that a winner. That movie has one of my favorite lines from a western:
"And now *you* understand. Anything goes wrong, anything at all... your fault, my fault, nobody's fault... it won't matter - I'm gonna blow your head off. No matter what else happens, no matter who gets killed I'm gonna blow your head off. "